A single action from a work in progress AuthItemController.

AuthItemController.php

<?php
public function actionDelete()
{
	$request = Yii::app()->request;
	if ($request->isPostRequest && isset($_GET['name']))
	{
		$name = $_GET['name'];
		/* @var $am CAuthManager|AuthBehavior */
		$am = Yii::app()->getAuthManager();
		$item = $am->getAuthItem($name);
		$type = $item->getType();
		if ($item instanceof CAuthItem)
			$am->removeAuthItem($name);

		if (!$request->isAjaxRequest)
			$this->redirect(array('index', 'type'=>$type));
	}
	else
		throw new CHttpException(400, 'Invalid request. Please do not repeat this request again.');
}