We don't have such a property, but I found a workaround for you. You have to set the same template as the one we use for menu items having
children. This is done like this:
| void item1_Loaded(object sender, RoutedEventArgs e)
| var menuItem = sender as RadMenuItem;
| menuItem.SubmenuItemTemplateKey = menuItem.SubmenuHeaderTemplateKey;
| menuItem.Template = menuItem.SubmenuHeaderTemplateKey;
I have attached a simple project which shows how it is done. If you need more help I will be glad to help you further.
the Telerik team