Welcome back to another OCC! This is a command creation that I forgot to upload. In this one I changed monster spawners to be more survival friendly.

Items:
The items you can get are as follows:
-Monster spawner (With crafting recipe)
-All spawn eggs available in the creative mode inventory (With crafting recipe)

How to:

Retrieving a monster spawner: To retrieve a monster spawner from it's location, you throw a diamond pickaxe with the enchantment Silk Touch I on it. BEWARE though that the diamond pickaxe MUST have only the Silk Touch I enchantment. No other enchantments can be on it.

Crafting a spawn egg: To obtain a spawn egg you throw a diamond and egg on top of the mob you wish to get as a spawn egg. Note though, that you can only get spawn eggs for the eggs you can get in creative mode. Warning: This will also work on tamed entities, so if you don't want a pet to be lost, be careful!

Crafting a monster spawner: Throw 8 iron bars, 1 diamond block, and 1 egg on each other to craft a monster spawner.

Setting a monster spawner's entity it spawns: Right-click the monster spawner with a spawn egg to convert the monster spawner into a spawner for that entity.
For example: Right-clicking a pig monster spawner with a zombie spawn egg turns the spawner into a zombie monster spawner.

About monster spawners:
All monster spawners you craft or retreive will turn into a pig spawner. That is so because the default monster spawner is a pig spawner. If you want further details on how monster spawners work, go here: minecraft.gamepedia.com/Monster_spawner

Credits:
-Made by ClassyElm
-Used Mr. Garretto's 1.9 Command Combiner
-Used JSON Creator for Minecraft

Command:
BEFORE you spawn the module, make sure your playing in Minecraft 15w47c+(1.9) otherwise this creation won't work.
1.9-1.10: http://pastebin.com/BajCiPQz
*This command does not include all monster eggs(such as zombie villager eggs, skeleton horse eggs, mule eggs, etc.)

1.11+: http://pastebin.com/aEYbEXKL