Galleries in alphabetic order

I’m pretty new to wordpress so please bear with me. I have started adding galleries to my website (which i haven’t made myself). All is going pretty good but i can’t figure out how to get the galleries in alpahabetic order (in the menu bar). Take a look at this link, it will explain what the problem is (I hope): http://www.aircraftprofiles.dk/?page_id=64

Thanks !