cls

An optional CSS class to set for the main TreeView HTML element.

<ul id="treeview">
    <li>My Project
        <ul>
            <li id="someid">js</li>
            <li>css</li>
        </ul>
        <li>index.html<li>
        <li>upload.php<li>
    </li>
</ul>

<script type="text/javascript">
    jQuery(function ($) {
        $("#treeview").shieldTreeView({
            cls: "custom"
        });
    });
</script>