Best Practice for: Codeigniter Website AND Mobile App

[eluser]PhilTem[/eluser]
[quote author="solid9" date="1354347684"]I think he needs bootstrap or foundation3[/quote]

That's the solution if you only want to have the layout responsive and use CSS techniques to hide/show content.
If, however, he wants to grab different content from the database or handle things differently for mobile devices (e.g. not allowing access to some controller) then he's gotta do it within the controller using above stated code