I use selectBoxIt component in my project. And I would like change style, like this:

And I use next code for implement this component:
<select id="appVersions">
<option ng-repeat="app in appVersions" value="{{app.version}}">APP vr.{{app.version}}</option>
</select>
var apps = $('#appVersions').selectBoxIt({
theme: 'jqueryui',
autoWidth: true
});
$timeout(function () {
apps.data('selectBox-selectBoxIt').refresh();
});
But after it he transform to default style, how to change style? Thanks a lot.