public function replace($res)
{
        $i=0;
        $i < count($res);
        foreach($res as $k=>$v)
        {
            if($res[$i]['imgurl']=='')
            {
                goto go;
            }
            $data= Db::table('xxxxxxxxxx')->field('path')->where('id',$res[$i]['imgurl'])->find();
            $res[$i]['imgurl2'] = $data['path'];
            go :
            $i++;
        }
        return $res;
}