How to call a function in CI

[eluser]CroNiX[/eluser]
I think you need to differentiate between "functions" and "methods". Functions are standalone, like trim($var). Methods are "functions" within classes, and require the class to work, $this->method_name.

With CI Controllers, you can't access a controller method outside of the current controller class, unless you use HVMC or something (which isn't standard).