<script type="text/javascript" src="chosen/chosen.jquery.min.js"></script>
<script type="text/javascript">
$(function(){
$(".chzn-select").chosen();
});
</script>
<select class="chzn-select" multiple="true" name="faculty">
<option value="AC">A</option>
<option value="AD">B</option>
<option value="AM">C</option>
<option value="AP">D</option>
</select>