i am nurzazin, web developer from indonesia, i am very interested with this job.
I 've made like this ( facebook login system ) a few months ago. you can check at http://zazin.cf.
thanks
due to previous experience with both codeigniter and facebook api, I am sure I can help you out with your issue. Pm me if you need any more details about me or if you could give me some details about the problem.