As DarklordFK said, you can use entity selectors. For example, let's say you have tile X at 18,63,18 and tile Y at 36,63,36, and each tile is ten blocks wide. Using the following command will teleport anything from tile X onto the centre of tile Y:
tp @e[18,60,18,4] 36 63 36
Unfortunately, there's a caveat to this. The radius selector selects entities in a spherical radius, not a cubic radius, so anything in the outer corners will not be teleported. The easiest way to fix this would be to create a chess board with circular cells and tell players to stay on the black/white as the example below. Alternatively, you could spam the teleport command with a comparator clock and teleport entities to Y=65 of the relevant cell. Use a testfor command looking for entities at Y=65 to turn off the teleport command, as only entities that have been teleported will be floating in the air.
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command blocks should have there own space along with barrier blocks, command blocks in mine-cards, mob-spawner (perhaps 1 spawner for each type of mob / or way to change the type of mob it spawns, say - with a spawn egg) - and any other odd blocks that you can only set or summon - that tab could be opened (for muli-player) by the admin or single player (in creative mode) via "open advanced tab" button or something to that