Your son is at the age where he doesn't need night time feedings. There are a few variations of helping him learn to sleep through the night. My sleeping program has worked with all 3 kids and even when there has been a regression due to teething or illness.
1) (My favorite), When he starts to cry, let him cry for 5 minutes. Go in and give him his binkie (don't talk to him or pick him up as this is reinforcing his waking up... he may continue to wake up just to get a little love from you). If he cries again, let him go 10 minutes and do the same thing, then 20 minutes, then 40 minutes, then 1 1/2 hours (set a timer for yourself so you can go to sleep in between (if you can sleep with him crying). My three children have all transitioned very quickly (in 3 days or less) with this method, I have allowed my 6 month old to regress and have one night time feeding when he was teething (some infants still need a quick feeding after 4-5 hours sleep up to 9 months old).
It's so hard to listen to a baby cry, it will be tempting to not work with him to get him to sleep through the night again. Stick with it, his body and brain need uninterrupted rest. If your husband encourages you to just feed him, don't give in... it's not good for you or your baby. Two excellent books which provide more information about this are: Healthy Sleep Habits, Happy Child by Dr. Mark Weissbluth and Sleeping Through the Night by Dr. Jodi Mindell
Another method is just to let him cry and cry... it will have the same results (I personally think the other method is a little more compassionate).
Good luck! T. : )