cls

Optional CSS class to add to the SplitButton element:

<button id="but1"></button>

<script type="text/javascript">
     $(function () {
        $("#but1").shieldSplitButton({
            cls: "some-css-style",
            dataSource: {
                data: [
                    { content: "Menu Item" }
                ]
            }
        });
     });
</script>