ProLoser/CakePHP-Wizard — pull request #3 by destinydriven (2012-07-07 01:18:47+00:00)
Title: $this->params() has been replaced in Cake 2.*  CakeRequest is now used to access same

Instead of $this->controller->params['controller'], any of the following should be used:

$this->controller->request['controller'];
$this->controller->request->controller;
$this->controller->request->params['controller'];

http://book.cakephp.org/2.0/en/controllers/request-response.html#accessing-request-parameters.