If you would like to inform the user, that his changes were successfully saved, you could add the following line to your Controller:

Yii::app()->user->setFlash('success',"Data saved!");

Displaying the flash message in a view is done by

if( Yii::app()->user->hasFlash('success') ) {
    echo Yii::app()->user->getFlash('success');
}

If you want the flash message to automatically fade out after a few seconds, you will have to add the following lines to your view:

Yii::app()->clientScript->registerScript(
			    'myHideEffect',
			    '$("div[class^=flash-]").animate({opacity: 1.0}, 3000).fadeOut("slow");',
			    CClientScript::POS_READY
			);