//处理父子级

    private function getChildBak($data,$parent_id = 0){

        $arr=array();

        $i = 0;

        foreach($data as $val){

            if($val['pId']==$parent_id){ 

                $val['label'] = $val['name'];

                $arr[$i]=$val;

                $son=$this->getChildBak($data,$val['id']);

                $arr[$i]['children']=$son;

                $i++;

            }

        }

        return $arr;

    }