帮忙改一下，路径老是出错 [ 2.0 版本 ]

modules\article\views\admin\action.php代码

<script>
    function checked($id){
        var vals = $("#name").val();
        var id=$id;
        $.ajax({
            type:'post',
            url:"<?= yii\helpers\Url::to(['admin/up']) ?>",路径老是出错
            data:{name:vals,id:id},

            success:function(msg){
                alert(msg);
                //$("#name").val(vals);
            }
        });
    }
</script>

  <?= app\widgets\GridView::widget([
    'dataProvider' => $dataProvider,
    'filterModel' => $searchModel,
    'columns' => [
       ['class' => 'yii\grid\CheckboxColumn'],
       'title',
        [
            'attribute' => 'cate',
            'format' => 'raw',
            'value' => function($model){
                return Html::dropDownList("cates[{$model->id}]",$model->cate,\common\models\Article::$cates,['id'=>'name','onchange' =>"checked($model->id)"]) ;
            }
        ],
      [
            'class' => 'app\widgets\ActionColumn',
            'template' => '{update} {view} {delete}',
       ],
    ]

])?>

modules\article\controllers\AdminController.php代码，我建了一个up方法，想通过它来修改ajax传过来的值

   public function actionUp(){
        
    }

请各位大神帮忙解决一下，哪里有问题，控制文件里帮忙完善起来。