Split buttons would allow to have a menu item that target a specific page and at the same time have sub items. It is possible to do it with the current version however it only works with mouse devices, the split button would provide the same functionality for touch devices.
Another way to think of it is as a button with a dropdown menu on the right. Tap/click on the dropdown and a menu opens underneath the button. [button | arrow-s] [-- menu dropdown --]