thinkPHP实现的联动菜单功能详解

//把栏目分组，以多维数组形式
public function group_category($id = 0)
{
    $list=$this->where('display = 1')->order('listorder asc')->select();
    $tmp = array();
    foreach($list as $v){
      if($v['parent_id'] == $id){
        $v['childs'] = $this->group_category($v['category_id']);
        $tmp[] = $v;
      }
    }
    return $tmp;
}