A set of links that helped me to get through to this far of this project

Form helpers
https://ellislab.com/codeigniter/user-guide/helpers/form_helper.html

Session helpers
https://ellislab.com/codeigniter/user-guide/libraries/sessions.html

https://www.youtube.com/watch?v=VI9rz4UUAOc
https://www.youtube.com/watch?v=l3bt88U0SI4
https://www.youtube.com/watch?v=fwUg3qvEJJ8
https://www.youtube.com/watch?v=IOZqRgOgSu4
https://www.youtube.com/watch?v=ck5pTkRumPw
https://www.youtube.com/watch?v=K71j-rWXejk


Form validation
https://ellislab.com/codeigniter/user-guide/libraries/form_validation.html
https://www.youtube.com/watch?v=T39lkofTq2M
http://www.formget.com/form-login-codeigniter
http://codesamplez.com/development/codeigniter-forms-tutorial
http://codesamplez.com/codeigniter-tuto