accessing config variables from helpers or library

[eluser]Jeremy Gimbel - Conflux Group[/eluser]
Helpers do not have direct access to the CodeIgniter object.

You'll need to either pass data in through the parameters of the function or consider moving the code to a Model, Controller or Library accordingly for its purpose.

Helpers are generally just used to do very general-purpose tasks that don't require access to the data and variables in the rest of the applications's objects.