Anyone successfully cut down number of night feeding for baby?

My 8 month old gets up 2-4 times a night to nurse. I had to feed her nightly until she was 6 months old due to a health problem. She could not eat so much at one feeding. But now she eats a lot of solids and my doctor said I should cut out some of the night feedings. I know she does not need to eat every 2 hours. It is a habit. I would like to stop feeding her between 11pm - 6am. Right now she gets up at 11, 1, 4 and then 7 usually. I've read that you can just comfort the baby after 11 but not pick her up. But isn't that sending a mixed message if you pick her up sometimes but not others? How do you phase out feedings at those times and say not at the 11pm? I can't see cutting out all the feedings at once. I think she would be hungry because she is used to eating. So I would like to keep it down to 1 or 2. Anyone have this issue and do anything that worked?