I can solve this with css:
ul.radio_list li label[for=unaestrella] {position:relative !important;float:left !important;line-height:25px !important;background-image:url(images/unaestrella.png);background-position:top left;background-repeat:no-repeat !important; width:100% !important;color:transparent !important;}
But it's possible with jQuery for delete text?