RadSiteMap provides support for RTL languages. They consider the direction attribute
set to the control itself or any parent HTML element. If you set the direction of
the body tag (or any other parent element that contains the control) to rtl,
RadSiteMap reverses the order of the elements and aligns itself to the right side
of the container.
<telerik:RadSiteMap ID="RadSiteMap1" runat="server" dir="rtl">