Is it CodeIgniter or not?

It sure looks like a CodeIgniter 3 app!

Awesome, yes, it must definitely be it!

Now the ultimate question is... How did they managed to customize it this far? e.g. their controllers, are named `controller.name.php` where `name` could be anything e.g. `shop; contact; user;` any idea how they did that?

If CodeIgniter allows us to customize our app structure and let us play with naming schemes, then this framework is really amazing ^^ for the fact it's a really flexible and versatile framework, give us true power and freedom!