Problem with button create image using id

Hi,

i am trying to create a button, something like that:




  'denable'=>array

(

  'options' =>  array('class' => 'denable'),

  'label'=>'use the selected element',

  'url'=>'"#"',

  'rel'=>'$data->id',

   'imageUrl'=>'$data->id',

),



But the url is $data->id and not the id…

how can i do that?