Array

(

    [0] => Array

        (

            [id] => 5

            [name] => PHP

            [pid] => 0

            [sort] => 1

            [blog] =>

        )

    [1] => Array

        (

            [id] => 2

            [name] => DIV+CSS

            [pid] => 0

            [sort] => 2

            [blog] => Array

                (

                    [0] => Array

                        (

                            [id] => 1

                            [title] => 这是一条测试文章

                            [time] => 1455717047

                        )

                )

        )

    [2] => Array

        (

            [id] => 3

            [name] => JavaScript

            [pid] => 0

            [sort] => 3

            [blog] => Array

                (

                    [0] => Array

                        (

                            [id] => 2

                            [title] => jquery博文

                            [time] => 1455763110

                        )

                    [1] => Array

                        (

                            [id] => 4

                            [title] => 博文博文

                            [time] => 1455869366

                        )

                )

        )

    [3] => Array

        (

            [id] => 4

            [name] => Apache

            [pid] => 0

            [sort] => 4

            [blog] =>

        )

    [4] => Array

        (

            [id] => 1

            [name] => HTML

            [pid] => 0

            [sort] => 5

            [blog] =>

        )

    [5] => Array

        (

            [id] => 6

            [name] => Linux

            [pid] => 0

            [sort] => 6

            [blog] =>

        )

    [6] => Array

        (

            [id] => 7

            [name] => 其他

            [pid] => 0

            [sort] => 7

            [blog] =>

        )

)

Public function index() {

    //获取所有父类分类

    $FaCate = M('Cate')->where(array('pid'=>0))->order('sort')->select();

    //获取所有分类

    $allCate = M('Cate')->order('sort')->select();

    // 引入分类类文件

    import('Class.Category', APP_PATH);

    $db = M('Blog');

    $field = array('id', 'title', 'time');//取出的字段

    foreach ($FaCate as $key => $value) {

        //根据父类id，获取子类id

        $cids = Category::getChildsId($allCate, $value['id']);

        //连同父类id一起放入数组，输出的结果是，父类id以及其下的所有子类id

        $cids[] = $value['id'];

        //根据查询出的id，查找博文表blog，获取博文数据,将博文数据放入Facate数组中的blog子数组中。

        $whe = array('cid'=>array('IN', $cids));//博文表中的查询条件，cid IN ('', '', '')

        //将查询除的数据放入blog数组中

        $FaCate[$key]['blog'] = $db->field($field)->where($whe)->select();//不能进行排序

    }

    print_r($FaCate);die;

    $this->cate = $FaCate;

    $this->display();

}