Believe me, they will grow out of it. I was skeptical too until my son just stopped wetting the bed one night. His urologists advice was to NEVER wake them up to go potty. This can only cause more wetting in the future because they are not ever fully awake when you take them potty. In the future it can cause them to have dreams where they think they are going into the bathroom and actually they are still in their beds when they pee.
There is a pill available that works on some kids, it helps concentrate their pee until their bodies go through puberty and start producing it on their own. (Some kids have bodies that don't produce this chemical until puberty, causing the majority of child bed wetting) The pills didn't work for my son, we just had to wait it out. He is also a very hard sleeper.
**On another note...when my son did start staying dry all night it was because older sister was going away to summer camp and he wanted to know why he never got to go to one. I told him that I was NOT sending an 8 yr old child to camp with pullups and that I would send him to a summer camp as soon as he outgrew the wetting. I think within 3 weeks he never had another accident. Huge difference for a kid who had NEVER kept the bed dry in his whole life. I really think for him it was mind over matter. He also convinced himself to sleep lighter, when I asked him how he stopped wetting he said he went to sleep every night telling himself he would not wet the bed, he would not wet the bed, he would not wet the bed. Strange, but it worked for him. Like I said though, his body was already producing the chemical it needed, he just needed to sleep lighter and to somehow wake up when he needed to pee. He is 9 now and still gets up at least once a night to potty. He is also going to church camp for the 2nd time!!!