CButtonColumn url для стандартных кнопок

array(    'class'=>'CButtonColumn',    'viewButtonUrl'=>'Yii::app()->controller->createUrl("students/view",array("id"=>$data->id))',    'updateButtonUrl'=>'Yii::app()->controller->createUrl("students/update",array("id"=>$data->id))',    'deleteButtonUrl'=>'Yii::app()->controller->createUrl("students/delete",array("id"=>$data->id))',
),