My LO is 11.5 months. We finally dropped the night feeds about a month ago.
I started with the 4 or 5 am feeding (for selfish reasons really, I was dying to get 6 hours uninterrupted sleep). When he woke for the feed, I just didn't feed him. I tied PU/PD (without the PU), but it didn't work for us. The first night was horrible. He decided that it was morning and time to get up. I got him out of bed, brought him to my bed and read a book with him until he was drowsy and then I was able to settle him in his crib. The second night was a bit better, the third night even better, and then he just stopped waking. I let him adjust to that for about a week and then I tackled the 11 or 12 am feeding (in the same way). Each time it took us 3 days.
It's tough, and I was dreading it, but it's so worth it in the end. Not that we got rid of the NWs though... the teething monster is paying us a visit at the moment

Good luck. We're here if you need us