[eluser]CroNiX[/eluser]
I don't believe you can dynamically change that value as it gets reset as soon as the next request gets sent when ci reloads the config files.
[eluser]CroNiX[/eluser]
I would advise you to download some of the existing auth systems available for CI and see how they implement the "remember me" cookie. Or just use that instead of making your own.