Similarly, the bonus to a given skill from an ability, is not a class feature, so you won't get to add Wis bonus to your bluff skill instead of Chr.
You bonus to Wis (or Chr) does not have any effect on which skills are class skills, so using Wisdom instead of Charisma wouldn't have any effect on that feature.
"You use your Wisdom, rather than your Charisma, to determine all class features and effects relating to your sorcerer class, such as bonus spells per day, maximum spell level you can cast, and the save DCs of your spells."
Are class skills considered class features?
thank you Nicole
The only thing a class skill determines is whether you get a +3 after taking one rank in it. The skill remains operated by it's base attribute.