Setting Select2 Tags
For stackoverflow answer.
HTML
<link rel="stylesheet" href="http://ecos.fws.gov/js/bootstrap-2.0.3/css/bootstrap.css">
<script src="http://ivaynberg.github.com/select2/select2-master/select2.js"></script>
<link rel="stylesheet" href="http://ivaynberg.github.com/select2/select2-master/select2.css">
<select id="tagSelect" style="width:300px;"> <option>xD</option></select>
JavaScript
$('#tagSelect').select2({ tags: ["red", "green", "blue"] });