Url Management -Edit Id Encrytion In Cgridview

In framework file : CButtonColumn.php
1. change the updateButtonUrl variable,
public $updateButtonUrl='Yii::app()->controller->createUrl("update",array("id"=>base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5("testKey"), $data->primaryKey, MCRYPT_MODE_CBC, md5(md5("testKey"))))))';

2. Use the public function actionUpdate($id)
{

$id =rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5("testKey"), base64_decode($id), MCRYPT_MODE_CBC, md5(md5("testKey"))), "\0");
echo $id;exit;