I removed Open Better Cities and rebuilt my Bashed Patch however the gates into the cities effected by the "Open" cities part of the mod no longer act as a cell teleport, instead the gates are static items with no activation or collision detection, im guessing this is an error on my part of the uninstallation, also some relevant information, i did this on the same savegame as when I had Open Better Cities installed, but i updated the game in Wrye Bash to accommodate or so i thought
Vorians put a guide book in your character's inventory back in ver. 3-7 (I think) that you're supposed to use to turn the "open" feature of each city on and off. If you did not use this,to deactivate the "open status" and then uninstalled the mod (which is what I assume you mean by removed) the doors would be static. It is also conceivable they could act like interior doors-that open to nowhere.
Forgot to include what's going to help you. If you can, reactivate the mod, find a saved game that the open portion of better cities was still active. Load that, go somewhere were better cities isn't. (Like a empty cave) Then, find your book in the inventory (I believe it's called "Guide to Better Cities" or something simular) and click on each cities name, then choose the "open cities" option for all available-it's an on/off switch. If you have lost your book, there is a console command you can use for each city-but you'll have to dig through the massively huge bsa file for it yourself.