A lot of them. And I found out what mod did this, OptiFine. I removed OptiFine and now I can see the Items/Blocks.
The interesting is, this 'bug' only affects the Non-Forge Based mods.
Edit: I see the Items well, but some Blocks are still with bugs. I'll put a Image soon.
Edit2: Image:
Edit3: Now I use only 3 mods that modify the Vanilla Class files, which are: Player API (vq.class), Render Player API (we.class) and NEI (gb.class). I don't think that may be one of these which are causing this bug.