Here's the Item ID List that for official PocketMine. http://korado531m7.html.xdomain.jp/SC/itemlist/itemlist.html
and also here http://minecraft-ids.grahamedgecombe.com/ (for MCPC) but it have search feature!! Please note that some of them arent 100% correct
I know that site. but it's not compatible. for ex (in pocketmine), the activator rail id is 126. But Minecraft PC is not 126. So, we need to check the id