Help!!

So, my 16 month old just recently started HATING going to bed at night. He also just figured out how to climb up the side of the crib onto the changing table two days ago. My husband and I are struggling. The crib is set at the lowest level, so we don’t know what to do from here. We truly don’t believe he’s ready to convert to the toddler bed yet. He would just destroy his room. But keeping him in his crib when he doesn’t want to be in it, is now impossible. I don’t know what sparked this sudden change. He used to sleep really good. He has one afternoon nap (about 2 hours) and he was good to go. Now, just last night he was up until 1am because he fought us so hard on going to bed. Any opinions, suggestions or advice would be greatly appreciated!