4 year old - hasn't slept through the night....

My 4 year, 3 month old boy can not sleep through the night....He has only ever slept through from 18months to 2 years old when he was in a cot. His sleep issues started when we moved him to a bed and we couldn't move him back to the cot as he was able to climb out.I am at a complete loss on what to do. He comes into our bed every single night (or calls out for us to go to him). We have tried to sit with him when he wakes up and re settle him but even if that is successful he will still wake up again that night and come into our room.My husband has also slept in his bed next to him in hopes of it helping to reassure him but he still woke up (and hoped out of bed without my husband waking up to realise he was miasing).We have tried white noise, led light, essential oils etc. He is only day toilet trained as he can't stay dry at night and I feel that this is partially why he can't sleep through (as he has a wet nappy some nights that needs to be changed at 10pm).He goes to bed routinely at 7pm (and has no day nap) and can be awake anywhere from 10pm-1am.Please help! via /r/Parenting http://ift.tt/2vVhXXF