The top-level navigation in the v4.master page is derived from the
<SharePoint:AspMenu> control (see Figure 17.112) and uses the
SPNavigationProvider for the
<SharePoint:AspMenu> control exposes a number of properties, which you can modify in the master page in SharePoint Designer. Key properties include the following:
UseSimpleRendering: If set to True, the navigation renders as a simple list rather than a table. If set to False, the navigation renders as a table (which was the default in SharePoint 2007 navigation). ...