I think there's a feature that allows you to sub your Cha for Wis if you're insane, actually. Well, maybe.
Q69: Is there a feature that allows substituting charisma for wisdom? either a feat, class feature or just a monster's quality.
In Bastards and Bloodlines (a 3rd party book), on page 91, there is a feat called Lost Tradition that allows you to switch the stat you use for spells from one to another (RAW, you could even cast with Strength).
Then there's Force of Personality (Complete Adventurer, p109), which switches your will saves to be Charisma dependent.
Is there a specific area you want to switch stats for, or are you looking to use CHA for everything that uses WIS?