To remove the annoying hidden inputs _Token.key and fields from your form (for example, to clear up the query string when using the GET method), you need to do the following things in beforeRender in addition to beforeFilter from tigrang answer :
 function beforeRender() { parent::beforeRender(); unset($this->params["_Token"]); } 
(This is true, at least for CakePHP 1.3)
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