Force a refresh on a Jquery Mobile controlgroup button on small screen display

I have a Jquery Mobile controlgroup with two buttons:

<div data-role="controlgroup" data-type="horizontal" class="headerMenu iconposSwitcher">
  <a href="#" data-role="button" data-icon="barcode" data-iconpos="left" class="EANView">EAN</a>
  <a href="#" data-role="button" data-icon="style" data-iconpos="left" class="styleView">Style</a>
</div>

On larger screens (PC, iPad) I want the text to show ~ data-iconpos="left". On smaller screens (Mobile, Smartphone) there is little space, so I don't want to display the text ~ data-iconpos="notext"

I can use the "refresh" function on select-menus. Is there a similar way to refresh controlgroups or button elements?

I tried it like this, changes iconpos, but does not rebuild the button.

    if ($('body').width() < 275)
      {
      $(".iconposSwitcher a").attr('data-iconpos','notext');
      $('.headerMenu').controlgroup('refresh', true);
      }

Thanks for hints & Rgs

EDIT:

This works:

$(".iconposSwitcher a").removeClass('ui-btn-icon-left').addClass('ui-btn-icon-notext'); 

Easier than thought...

EDIT:

For div elements (controlgroup with input):

$(".iconposSwitcher-div a").attr('data-iconpos','notext').removeClass('ui-btn-icon-left ui-btn-icon-right').addClass('ui-btn-icon-notext');                                                                                                 

maybe its too late but for those who come here with same question:
You can use .trigger('create') on any Element to trigger 'Create' event to do JQM magic on elements.

I've solved it this way:

$button = [YOUR CONTROLGROUP DIV]

$button.find('a').button();

$button.controlgroup();

For buttons, use the buttonMarkup() method instead of controlgroup()

In general, I prefer the usage of the page() method, see this post

Jquery Mobile: updating a form more than once

What works for me is calling controlgroup() twice; once to initialize, next to refresh, eg:

// refresh group
$('#checkboxes').controlgroup().controlgroup('refresh');