Product details and demo: http://1stcoder.com/product/cimembership-codeigniter-users-manager/

Facebook apps creation:

• Go to the https://developers.facebook.com/apps/ and login at your Facebook account.
• Click Add a New App and choose Website

• Choose Name for you App and Click Create New Facebook App ID

• Choose the category of the App and Click Create App ID

• Now Click Skip Quick Test

• If you want to test Facebook login at the localhost server, then your App Domains should be localhost. Also localhost domain will only work, once you add platform. For add a platform click on Settings link from the left menu section at the apps page => click on the Add Platform button => choose Website category => enter site URL (http://www.yourdomain.com/).
• Copy the credentials to CIMembership admin panel.
• Now click on Status & Review link from the left menu section to make your apps as live.
• CIMembership needs email, user_about_me, user_hometown, user_location, user_website and user_work_history permissions for social login, check these permissions and apply for review.
• Contact email is required for enable the apps live option. If you have not add apps contact email earlier, go to the settings page and add email.
• Once review is completed, you can use the app on live.