提供两种方式的分类树格式，表格和下拉框形式的树形结构
可以自定义表格和下拉框的样式，自定义以哪一列的参数为格式化数据，自定义层级关系参数，自定义表格列名称，也可以设置时间的格式化。

调用方式

表格方式：

下拉框方式

TreeWidget.php

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of Tree
 *
 * @author 汪嘉诚
 * @email 819434425@qq.com
 * 
 * 表格方式调用
    <?php $this->widget(\'ext.tree.widgets.TreeWidget\',array(
        \'dataProvider\'  => $dataProvider,           // 传递数据
        \'pid\'           => \'pid\',                   // 设置层级关系id
        \'tableClass\'    => \'items table table-striped table-bordered table-condensed\',  // 表格样式
        \'formatParam\'   => \'name\',                  // 设置格式化字段   
        \'formatTime\'    => array(                   // 设置格式化的时间参数
            \'created\'
        ),              
        \'tableHead\'     => array(                   // 设置表格列头信息
                \'分类ID\',
                \'频道\',
                \'中文名\',
                \'英文名\',
                \'首字母\',
                \'排序\',
                \'分类级别\',
                \'父ID\',
                \'创建时间\',
        ),   
    )); ?>
 *
 * 下拉框方式调用
 * <?php $this->widget(\'ext.tree.widgets.TreeWidget\',array(
            \'dataProvider\'  => $cate,           // 传递数据
            \'pid\'           => \'pid\',                   // 设置父ID           
            \'formatParam\'   => \'name\',                  // 设置格式化字段
            \'treeType\'      => false,                   // 输出树格式
            \'selectClass\'  => \'class=\"span11\"\',         // 设置下拉框样式
             \'defaultSelectValue\' => array(             // 设置下拉框的默认值和选项
                    0 , \'≡ 作为一级栏目 ≡\'
             ),
        )); ?>
 */
class TreeWidget extends Widget {
    /**
     * CArrayDataProvider 数据对象或数组数据
     * 组件数据接收参数
     * @var Object || array
     */
    public $dataProvider;

    /**
     * 赋值接收数据
     * @var type
     */
    public $arrAll = array();

    /**
     * 按_ID作键名的多维关系
     * @var type
     */
    public $arrIdRelation = array();

    /**
     * 按_ID作键名的多维关系的简化,用来输出树状图
     * @var type
     */
    public $arrIdRelationSimple = array();

    /**
     * 将原始数据转化成的_ID作键名的数组
     * @var type
     */
    public $arrIdAll = array();

    /**
     * 所有的父子关系
     * @var type
     */
    public $arrIdSon = array();

    /**
     * 叶子节点的_ID
     * @var type
     */
    public $arrIdLeaf = array();

    /**
     * 根节点的_ID
     * @var type
     */
    public $arrIdRoot = array();

    /**
     * 每个节点下的子孙后代_ID
     * @var type
     */
    public $arrIdChildren = array();

    /**
     * 每个节点回逆到根
     * @var type
     */
    public $arrIdBackPath = array();

    /**
     * 输出树的结构
     * @var type
     */
    public $strItem = \'<br />{$strSep}{$name}\';

    /**
     * 设置表格样式
     * @var type
     */
    public $tableClass  = \'items table table-striped table-bordered table-condensed\';

    /**
     * 数据字段参数数组
     * @var type
     */
    public $dataKey   = array();

    /**
     * 指定需要格式化的字段
     * @var type
     */
    public $formatParam = \'name\';

    /**
     * 表格列名称
     * @var type
     */
    public $tableHead   = array();

    /**
     * 父ID
     * @var type
     */
    public $pid = \'pid\';

    /**
     * 指定树的类型
     * true 表格类型树
     * false 下拉框类型树
     * @var type
     */
    public $treeType = true;       

    /**
     * 绑定下拉框value值
     * @var type
     */
    public $optionValue = \'id\';

    /**
     * 格式化时间
     * @var type
     */
    public $formatTime = array();

    /**
     * 下拉框样式
     * @var type
     */
    public $selectClass = \'class=\"span3\"\';

    /**
     * 设置下拉框的默认值和选项
     * @var type
     */
    public $defaultSelectValue = array(
        0,\'≡ 作为一级栏目 ≡\',
    );

    /**
     * 设置下拉框是否多选
     * true 多选
     * false 单选
     * @var type
     */
    public $isMultiple = false;

    /**
     * 绑定到下拉框的默认值
     * @var type
     */
    public $bindSelectValue = 0;
   

    /**
     * 运行
     */
    public function run() {               
            if (is_array($this->dataProvider) && count($this->dataProvider) > 0)
                    $data = $this->_run($this->dataProvider);
            else if (is_object($this->dataProvider) && count($this->dataProvider->rawData) > 0)
                    $data = $this->_run($this->dataProvider->rawData);                   

                               
            $this->render(\'tree\' , array(\'data\'=>$data));
    }

    /**
     *
     * @return type
     */
    private function _run($datas){           
            foreach ($datas as $data)
                    $this->arrAll[] = $data;
                    $this->dataKey = array_keys($data);

            $this->processData();
            if ($this->treeType === true)
                    $data = $this->getTable();
            else
                    $data = $this->getSelect($this->pid, $this->bindSelectValue, $this->isMultiple, $this->selectClass, $this->defaultSelectValue);

            return $data;
    }

    /**
     * 获得html
     * @return type
     */
    public function getHtml() {
            return $this->genHtml();
    }

    /**
     * 设置分层字段
     * 表格类型
     * @return string
     */
    public function getItemName(){           
            $html = \'<tr>\';
            foreach($this->dataKey as $v) {                   
                    if ($this->formatParam == $v)
                            $str = \'{$strSep}\';
                    else
                            $str = \'\';

                    $html .= \'<td>\'.$str.\'{$\'.$v.\'}</td>\';
            }
            $html .= \'</tr>\';
            return $html;
    }

    /**
     * 获取表格列名称
     * @return string
     */
    public function getTableHead(){
            $html = \'<tr>\';
            foreach($this->tableHead as $v)
                    $html .= \'<th>\'.$v.\'</th>\';

            $html .= \'</tr>\';
            return $html;
    }

    /**
     * 获得表格形式的树
     * @return string
     */
    public function getTable() {                   
            $this->strItem = $this->getItemName();
            $strRe = \'<table class=\"\'.$this->tableClass.\'\">\';
            $strRe .= \'<thead>\'.$this->getTableHead().\'</thead><tbody>\';
            $strRe .= $this->genHtml();
            $strRe .= \'</tbody></table>\';
            return $strRe;
    }   

    /**
     * 获取下拉框形式的树
     * @param type $strName
     * @param array $arrValue
     * @param type $blmMulti
     * @param type $strExt
     * @param type $arrFirst
     * @return string
     */
    public function getSelect($strName = \'tree\', $arrValue = array(), $blmMulti = false, $strExt = \'\', $arrFirst = null) {
            !is_array($arrValue) && $arrValue = array($arrValue);
            foreach ($this->arrIdAll as $strTemp => $arrTemp) {
                    $this->arrIdAll[$strTemp][\'selected\'] = \'\';

                    if (in_array($arrTemp[\'id\'], $arrValue)) {
                            $this->arrIdAll[$strTemp][\'selected\'] = \' selected=\"selected\"\';
                    }
            }
            $this->strItem = \'<option value=\\\"{$\'.$this->optionValue.\'}\\\"{$selected} title=\\\"{$\'.$this->formatParam.\'}\\\">{$strSep}{$\'.$this->formatParam.\'}</option>\';
            $strRe = \'<select id=\"id_\' . $strName . \'\" name=\"\' . $strName . ($blmMulti ? \'[]\' : \'\') . \'\"\';
            $strRe .= ($blmMulti ? \' multiple=\"multiple\"\' : \'\') . (empty($strExt) ? \'\' : \' \' . $strExt) . \'>\';

            if (is_array($arrFirst) && count($arrFirst) == 2) {
                    $strRe .= \'<option value=\"\' . $arrFirst[0] . \'\">\' . $arrFirst[1] . \'</option>\';
            }

            $strRe .= $this->getHtml() . \'</select>\';           
            return $strRe;
    }

    /**
     * 数据处理
     * @param type $arrData
     * @return type
     */
    private function helpForGetRelation($arrData) {
            $arrRe = array();
            foreach ($arrData as $strTemp => $arrTemp) {
                    $arrRe[$strTemp] = $arrTemp;
                    if (isset($this->arrIdRelation[$strTemp])) {
                            $arrRe[$strTemp] = $this->arrIdRelation[$strTemp];
                    }
                    if (count($arrRe[$strTemp]) > 0) {
                            $arrRe[$strTemp] = $this->helpForGetRelation($arrRe[$strTemp]);
                    } else {
                            array_push($this->arrIdLeaf, $strTemp);
                    }
            }
            return $arrRe;
    }

    /**
     * 数据处理
     * @param type $arrData
     * @return type
     */
    private function helpForGetChildren($arrData) {
            $arrRe = array_keys($arrData);
            foreach ($arrData as $arrTemp) {
                    $arrRe = array_merge($arrRe, $this->helpForGetChildren($arrTemp));
            }
            return $arrRe;
    }

    /**
     * 数据处理
     * @param type $str
     * @return type
     */
    private function helpForGetBackPath($str) {
            $arrRe = array();
            $intTemp = $this->arrIdAll[$str][$this->pid];
            if ($intTemp > 0) {
                    $intTemp = \'_\' . $intTemp;
                    array_push($arrRe, $intTemp);
                    $arrRe = array_merge($arrRe, $this->helpForGetBackPath($intTemp));
            }
            return $arrRe;
    }

    /**
     * 数据处理
     */
    private function processData() {
            $count = count($this->arrAll);
            foreach ($this->arrAll as $arrTemp) {           
                    $strTemp = \'_\' . $arrTemp[\'id\'];
                    $this->arrIdAll[$strTemp] = $arrTemp;
                    if ($arrTemp[$this->pid] > 0 && $count > 1) {
                            $strTemp_ = \'_\' . $arrTemp[$this->pid];
                            !isset($this->arrIdRelation[$strTemp_]) && $this->arrIdRelation[$strTemp_] = array();
                            $this->arrIdRelation[$strTemp_][$strTemp] = array();
                            !isset($this->arrIdSon[$strTemp_]) && $this->arrIdSon[$strTemp_] = array();
                            array_push($this->arrIdSon[$strTemp_], $strTemp);
                    } else {
                            !isset($this->arrIdRelation[$strTemp]) && $this->arrIdRelation[$strTemp] = array();
                            array_push($this->arrIdRoot, $strTemp);
                    }
            }

            $this->arrIdRelation = $this->helpForGetRelation($this->arrIdRelation);
            $this->arrIdLeaf = array_unique($this->arrIdLeaf);
            foreach ($this->arrIdRelation as $strTemp => $arrTemp) {
                    $this->arrIdChildren[$strTemp] = $this->helpForGetChildren($arrTemp);
                    in_array($strTemp, $this->arrIdRoot) && $this->arrIdRelationSimple[$strTemp] = $arrTemp;
            }
            $arrTemp = array_keys($this->arrIdAll);
            foreach ($arrTemp as $strTemp) {
                    $this->arrIdBackPath[$strTemp] = $this->helpForGetBackPath($strTemp);
            }
    }

    /**
     * 数据处理
     * @param type $intLen
     * @return string
     */
    private function genSeparator($intLen) {
            $strRe = \'\';
            $i = 0;
            while ($i < $intLen) {
                    $strRe .= \'　\' . (($i + 1 == $intLen) ? \'├\' : \'│\');
                    $i++;
            }

            !empty($strRe) && $strRe .= \'─\';
            return $strRe;
    }

    /**
     * 数据处理
     * @param type $arrRelation
     * @param type $intSep
     * @return type
     */
    private function genHtml($arrRelation = null, $intSep = 0) {
            $strRe = \'\';
            null === $arrRelation && $arrRelation = $this->arrIdRelationSimple;
            foreach ($arrRelation as $strKey => $arrTemp) {
                    if (count($this->arrIdAll[$strKey]) > 0) {
                            if (!empty($this->formatTime) && count($this->formatTime) > 0) {
                                    foreach($this->formatTime as $formatTime) {
                                            if ($this->arrIdAll[$strKey][$formatTime] > 0) {
                                                    $this->arrIdAll[$strKey][$formatTime] = date(\'Y-m-d H:i:s\' , $this->arrIdAll[$strKey][$formatTime]);
                                            }
                                    }                                   
                            }

                            $strSep = $this->genSeparator($intSep);                       
                            extract($this->arrIdAll[$strKey]);
                            eval(\'$strRe .= \"\' . $this->strItem . \'\";\');                                               
                            count($arrTemp) > 0 && $strRe .= $this->genHtml($arrTemp, ($intSep + 1));
                    }
            }           
            return $strRe;
    }
}
?>