I may get slated for this but here goes!
Some background first me thinks...
I breast fed my first till he was a year old, My husband went to Iraq when he was 12 weeks old. My first son was 20months when he went.
Oscar was 6 months old and waking 3 times a night, always at exactly the same time, I had got into the habbit of feeding him if he woke up, it was easier for me to feed him and doze while I did it with my hubby been away. I was 100%sure this was a habbit as it was always EXACTLY the same time, down to the minute evry night he would be up. Some times I just had to put my boob on his cheek and he would snuggle in and go to sleep again. It came to the point were I was exhausted trying to deal with a toddler and breast feeding. I even considered giving up totally. However, a friend suggested conrol crying. (you know whwere you go in for 1 min and leave for one min, go in for 2 min leave for 2 min). I tried this and got no where at all as everytime he saw me he expected milk and cuddles. It broke my heart to see him like this. I percivered for 2 weeks like this. I looked like a bloody zombie.
In the end I had to be so cruel. I left him to it. When he woke up he cried for 5 mins max and then went back to sleep! I was in total shock, the first night I did this he woke up 3 times, at his normal habbit waking times. Each time he did cry but only for 5 mins max and got a lot less distressed then when I tried doing control crying. Infact I would say he more moaned and whimpered for 5 mins than cay! The second night he woke once on one of his regular times but settled himself back down within a couple of mins. The third night I didn't hear a peep and was tempted to poke him in the morning to make sure he wasn't in a coma.
He is now a healthy 1 year and 2 months and sleeps through every night and is an absolute treasure.
So anyway - if you are sure it isn't hunger and only a habbit try knock it on the head. I got into a right rut with it and it nearly stopped me feeding alltogether.