简单的无限极分类

    function getCat()
    {

     

//sql语句 自行替换

        $dt=getData("select c.category_id,cd.name,c.parent_id,c.sort_order,c.image from hb_category as c left join hb_category_description as cd on c.category_id=cd.category_id where  c.status=1 and c.type=0 order by c.category_id desc");


         $arr=array();


        //将分类id 赋予key 以便更好的排序
        foreach ($dt as $key => $value) {
         $arr[$value['category_id']]=$value;
        }

        //根据父id 进行分类
        foreach ($arr as $key => $value) {
         $arr[$value['parent_id']]['son'][]=$arr[$key];
        }


        $menu=array();
        foreach ($arr as $key => $value) {
         if(@$value['parent_id'] == 0 && isset($value['parent_id']))
         $menu[]=$value;
        }


        print_r($menu);
    }