View data-file of this sample
View css-file of this sample

To make your menu CSS-based set the following menu parameters:

var cssStyle = 1;
var cssSubmenu = "className";
var cssItem = ["classNameNormal","classNameOver"];
var cssItemText = ["classNameNormal","classNameOver"];

Where:
    var cssStyle=1 turns CSS mode on.
    var cssSubmenu is a CSS class name for all submenus.
    var cssItem is CSS class names for all items (normal state, mouseover state).
    var cssItemText is CSS class names for text of all items (normal state, mouseover state).

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It's possible to appoint individual CSS styles for separate elements of the menu using individual item styles and individual submenu styles.