public function actionDelete($id)
{
$criteria = new \CDbCriteria();
$criteria->addCondition('id = :id');
$criteria->params = array(':id' => $id);
$message = Element_OphCoMessaging_Message::model()->find($criteria);
$message->updateByPk($id, array('marked_as_read' => 1));
$this->redirect(array('/OphCoMessaging/Inbox'));
}