Update framework/web/helpers/CHtml.php

If $beforeRequiredLabel and $afterRequiredLabel are already set you can use beforeInnerRequiredLabel and/or afterInnerRequiredLabel trough htmlOptions.

With this patch you are able to generate html code like this.
<label class="control-label required" for="ContactForm_name"><i class="icon-user"></i> Name <span class="required">*</span></label>

by simple call like that.
$form->labelEx($model,'name', array('class'=>'control-label', 'beforeInnerRequiredLabel'=>'<i class="icon-user"></i> '));