I followed this tutorial here:
http://www.dannyherran.com/2011/02/facebook-php-sdk-and-codeigniter-for-basic-user-authentication/
It works great but when I enable CSRF protection I no longer get the info back from facebook. How can I use Codeigniter CSRF protection and the facebook sdk?
I belive CI-3 offers a whitelist for turning CSRF on / off .
Until then you might need to hack the config file.
Check to see what class is in the uri then run a conditional based on the result to turn CSRF on / off.