/**
  * 菜單列表
  */
  public function index(){ 
		$menuList= Db::name('menu')->order('sort,id')->select();
		//遞歸排序
		$menuList= $this->sort($menuList);
		$this->assign('menuList',$menuList);	
    return view();	
  }
	protected function sort($data,$pid=0,$level=0){
		//此處數(shù)據(jù)必須是靜態(tài)數(shù)組，不然遞歸的時候每次都會聲明一個新的數(shù)組
		static $arr = array();
    foreach ($data as $key=>$value){
      if($value['pid'] == $pid){
        $value["level"]=$level;
        $arr[]=$value;
				//unset()用于銷毀指定的變量
				unset($this->data[$key]);
        $this->sort($data,$value['id'],$level+1);
      }
    }
    return $arr;
  }

tbody>
{volist name="menuList" id="vo" key="index"}
  tr>
    td class="text-left">
    ?php 
      if($vo['pid']!=0) 
        echo str_repeat("nbsp;",$vo["level"]*3).'├╌ ' 
        /*str_repeat()函數(shù)把字符串重復指定的次數(shù)。*/ 
    ?>
    {$vo.name}
    /td>						
  /tr>
{/volist}
/tbody>