Well, I tested the library with OBSession, and it works fine. No special integration is needed, I just followed the guidelines on OBSession homepage, ie:
- copy Session.php file to library folder,
- create a new table in database, to store OB sessions,
- change config-file correspondingly,
That's it.
PS: I didn't find any advantages of OBSession in comparison to native CI sessions. Would you explain the reasons to use it?