Add Drop Down to Yii Grid

Add  Drop Down to Yii Grid

$myColumns [] = array(
    'type' => 'raw',
    'header' => "Page Size",
'filter' => CHtml::dropDownList('pageSize', $pageSize, Yii::app()->params['defaultPageDdSize'], array('style' => 'font-size:11px; width: 50px; padding: 0px 0px 0px 0px; height: initial; ',)),
      'value' => '"<a href=\'javascript:void(0);\' onclick=\'renderView(".$data->id_games.")\' class=\'view\' data-toggle=\'tooltip\' title=\'\' data-original-title=\'View\'>
                  <i class=\'icon-eye-open\'></i></a> &nbsp;
      <a href=\'' . Yii::app()->controller->createUrl('update&id=$data->id_games') . '\' class=\'update\'  data-toggle=\'tooltip\' title=\'\' data-original-title=\'Update\'>
        <i class=\'icon-pencil\'></i></a> &nbsp;
<a class=\'delete\' onclick=\'renderDeleteForm(".$data->id_games.")\' data-toggle=\'tooltip\' title=\'\' data-original-title=\'Delete\'>
        <i class=\'icon-trash\'></i></a>
"',
    'htmlOptions' => array('class' => 'button-column','style' => 'width:62px')
);