CodeIgniter lets you organize all your functions inside helpers files. This is great, because I reuse the same functions in some controllers and I have to copy/paste all of them from one to another, so the idea of using a single file is a lot better.
So, I need to put all my "callback_column functions" inside a helper file for a better management. But, once this is done, how can I call/use the function in the controller?
P.S. I am not that good with Object Oriented Programming, so please be gentle