Hi,
By default Bootstrap doesn’t have vertical navbars so this is not a tested scenario with the SmartMenus Boostrap plugin although it probably wouldn’t be very difficult to achieve. If you like, please post a live demo of how you created your vertical navbar and I will check if it could be done quickly. If it requires more time (which, unfortunately, I currently don’t have), I may consider creating some kind of demo in the future).
Thanks!