Remove all markup from user registration field
function tweakform_field_widget_form_alter(&amp;$element, &amp;$form_state, $context) {    
  $element['#theme_wrappers'] = '';    
  $element['#prefix'] =&gt; '&lt;div class="red"&gt;'; 
  $element['#suffix'] =&gt; '&lt;/div&gt;';
}