Dynamic variable easy implementation

[eluser]Designinglives[/eluser]
I'm currently looking for the best way to show a variable over all my pages without the need to make a $data['tokens'] variable in every single function we have in these controllers. The tokens I want to show will be variable and need to be taken from a database for each view. I was thinking about making a global variable but not sure if that's the right way to go. Declaring it in each controllers main function didn't work out for me.

Anyone has any suggestion?

Thanks in advance!