How indicating to CHtml::form the right url format ?

Hi all,

I have a form and and a controller. My question is about Url that generates the CHtml::form

my Code




    <?php 

        echo CHtml::form($this->createUrl('concept/displayMosaique/'),'get',array('id'=>'conceptFiltre'))

    ?>

      

      

        <div id="dateFiltre">

            <label for="Concept_dateAnnee">Classement par Année </label>

            <?php echo CHtml::dropdownList('annee','dateAnnee',array('2011'=>'2011','2010'=>'2010')

                        ,array('prompt' =>'Toutes les Années' ) ); ?>

        </div>

      

        <div id='formButton'>

            <input type="submit" value="Afficher" />

        </div>

      

   <?php echo CHtml::endform() ?> 



This code generates url like this


htt://mywebsite/concept/displayMosaique?annee=2011 for instance



But I would like


htt://mywebsite/concept/displayMosaique/annee/2011 



In my config/main.php I wrote


'concept/displayMosaique/<filtre:\w+>/<data:\w+>'=>'concept/displayMosaique',

with this last code I can enter htt://mywebsite/concept/displayMosaique/annee/2011 and it works fine

But is there a way to indicate to my CHtml::form that I want this kind of url rather than


htt://mywebsite/concept/displayMosaique?annee=2011 for instance



thanks