function getTree($data, $pId)

{

    $tree = '';

    foreach($data as $k => $v)

    {

        if($v['cate_ParentId'] == $pId)

        {         //父亲找到儿子

            $v['cate_ParentId'] = getTree($data, $v['cate_Id']);

            $tree[] = $v;

            //unset($data[$k]);

        }

    }

    return $tree;

}

$data=Db::table("bg_cate")->select();

$tree = getTree($data, 0);

function procHtml($tree)

{

    $html = '';

    foreach($tree as $t)

    {

        if($t['cate_ParentId'] == '')

        {

            $html .= "<li>{$t['cate_Name']}</li>";

        }

        else

        {

            $html .= "<li>".$t['cate_Name'];

            $html .= procHtml($t['cate_ParentId']);

            $html = $html."</li>";

        }

    }

    return $html ? '<ul>'.$html.'</ul>' : $html ;

}

echo procHtml($tree);

CREATE TABLE `bg_cate` (

`cate_Id` int(30) unsigned NOT NULL AUTO_INCREMENT,

`cate_ParentId` int(30) unsigned DEFAULT '0',

`cate_Name` varchar(100) NOT NULL,

`cate_Intro` varchar(500) DEFAULT NULL,

`cate_Order` int(30) unsigned DEFAULT '0',

`cate_Icon` varchar(100) DEFAULT NULL,

PRIMARY KEY (`cate_Id`)

) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=34 ;

--

-- 导出表中的数据 `bg_cate`

--

INSERT INTO `bg_cate` (`cate_Id`, `cate_ParentId`, `cate_Name`, `cate_Intro`, `cate_Order`, `cate_Icon`) VALUES

(4, 0, '往事如风', '记录往事', 0, 'icons/6.gif'),

(5, 0, '水煮三国', '品位三国智慧', 0, 'icons/3.gif'),

(2, 0, '技术学习', '平时学习的一些笔记，欢迎批评指正。', 0, 'icons/18.gif'),

(3, 0, '生活点滴', '记录生活点滴', 0, 'icons/2.gif'),

(6, 0, '栀子花开', '青春无限', 0, 'icons/8.gif'),

(7, 0, '假日休闲', '悠闲、自在', 0, 'icons/24.gif'),

(8, 2, 'html', 'html学习', 0, 'icons/1.gif'),

(9, 2, 'css', 'css学习', 0, 'icons/1.gif'),

(10, 2, 'php', 'php学习', 0, 'icons/18.gif'),

(11, 10, 'php基础知识', 'php基础知识', 0, 'icons/1.gif'),

(12, 10, 'oop', 'oop', 0, 'icons/1.gif'),

(13, 10, 'php安全', '讲述php安全', 0, 'icons/1.gif'),

(14, 10, 'seagull framework', 'seagull framework', 0, 'icons/1.gif'),

(15, 2, 'javascript', 'javascript学习', 0, 'icons/1.gif'),

(16, 2, '设计模式', NULL, 0, 'icons/1.gif'),

(17, 2, '软件工程', '软件工程学习', 0, 'icons/1.gif'),

(18, 3, '厦门生活', '厦门生活', 0, 'icons/8.gif'),

(19, 3, '大学生活', '大学生活', 0, 'icons/8.gif'),

(20, 3, '童年生活', '童年生活', 0, 'icons/15.gif'),

(21, 19, '学习', '学习', 0, 'icons/1.gif'),

(22, 19, '运动', '运动', 0, 'icons/16.gif'),

(23, 19, '旅游', '旅游', 0, 'icons/24.gif'),

(24, 22, '排球', '排球', 0, 'icons/9.gif'),

(25, 22, '篮球', '篮球', 0, 'icons/9.gif'),

(26, 22, '羽毛球', '羽毛球', 0, 'icons/9.gif'),

(27, 22, '乒乓球', '乒乓球', 0, 'icons/9.gif');

CREATE TABLE IF NOT EXISTS `class` (

  `id` mediumint(6) NOT NULL AUTO_INCREMENT,

  `title` varchar(30) NOT NULL,

  `pid` mediumint(6) NOT NULL DEFAULT '0',

  PRIMARY KEY (`id`)

) ENGINE=MyISAM  DEFAULT CHARSET=utf8;