I lost my cell phone and I need to get my wife number which is on my contact list so how can I get my cell phone contact list.

What carrier do you have? Some have it set up so you can access information like that online. I think that's usually only with smartphones, though. Other than that, I'm afraid you're out of luck.

In the future I would suggest keeping all contacts saved in multiple places.

You don't know your wife's phone number?