Ok - You need to do the routine and leave like you normally do (books, kiss, etc) and if he gets up, just silently walk him back to bed and tell him 1 time that if he stays in bed...(more)6-12-2016 7:06pm
until morning he will get the reward of doing X (Something he loves and will be upset if he misses - like a particular TV show he watches each day). If he gets up again, walk him back - say nothing. Repeat 100x if needed. Make a simple chart and give him stickers for the days he stays in bed and then take him to do something fun (ice cream?) every 3 days then stretch it out.