jQuery addClass example
Change class name on click in jQuery
HTML
<script src="https://harvesthq.github.io/chosen/chosen.jquery.js"></script>
<link rel="stylesheet" href="https://harvesthq.github.io/chosen/chosen.css">
<select id="myselect" multiple="multiple" size="3">
</select>
<br><br><br><a href="javascript:;" id="trigger">Go</a>
CSS
#myselect { width: 150px;}
JavaScript
$("#trigger").click(function(){
$("#myselect").show().html('<option value="1">1</option><option value="2">2</option><option value="3">3</option><option value="4">4</option>');
$('#myselect_chosen').remove();
$("#myselect").chosen({rtl: true, allow_single_deselect: true});
})