Unfortunately--there isn't. Some of the menus will have some wines listed, but most WDW restaurants (well, the Signature restaurants) have seperate wine lists. These don't seem to get posted on the menu sites.
I can tell you that most of the Signature restaurants have pretty good wine lists--California Grill and Jiko especially.
The wines are a bit pricy though--at CG the average by the glass price is about $12.50. The lowest is $9.00, the highest is $20.00. And yes--that's a GLASS!!