[eluser]TheFuzzy0ne[/eluser]
Welcome to the CodeIgniter forums.
I don't think it's possible because once the session has expired, the server has no way of knowing this at the framework level. That is, of course, unless you set up another database table that has a row corresponding to the user that's updated on each request with the time that the session expires. This way you will be able to tell when a session has expired by seeing if the date in the corresponding row is less than the current date. This doesn't have to be a standalone table - it could also be a field in the users table.