YII CGridView with custom action button

<?php 
$this->widget('zii.widgets.grid.CGridView', array(
    'dataProvider'=>$model->search(),
    'filter'=>$model,
    "itemsCssClass" => "table_design_1",
    "htmlOptions" => array(
        "class" => "div_contact_admin_grid_view"
    ),
    "ajaxUpdate" => false,
    'columns'=>array(
        array(
            'name'=>'family_name', 
            'header'=>'First name',
            'type' => 'raw',
            'value' => 'CHtml::link($data->family_name,$data->id)'
        ),
        array(
            'name'=>'given_name', 
            'header'=>'Last name',
            'type' => 'raw',
            'value' => 'CHtml::link($data->given_name,$data->id)'
        ),
        array(
            'class'=>'CButtonColumn',
            'template'=>'{delete_contact}{view}{update}',
            'buttons'=>array (
                'delete_contact' => array (
                    'label'=>'Delete this contact',
                    'imageUrl'=>Yii::app()->request->baseUrl.'/images/delete.png',
                    'url'=>'Yii::app()->createUrl("contact/delete", array("id"=>$data->id))',
                    'visible' => '1',
                    "options" => array(
                        "class" => "delete_contact"
                    )
                )
            ),
            'viewButtonUrl'=>'Yii::app()->request->getBaseUrl(true)."/contact/view/".$data["id"]',
            'updateButtonUrl'=>'Yii::app()->request->getBaseUrl(true)."/contact/update/".$data["id"]',
            "htmlOptions" => array(
                'style'=>'width: 60px;',
                'class' => 'action_class'
            )
        )
    )
)); ?>