I need to split guitar output sound

A Radical Re Amp box will do that and they are clean

another cool option:
http://www.sweetwater.com/store/detail/BuffSplit
 
 

I'm wondering why your getting hum and his from the DI boxes.. I own the Behringer DI 20 and even though not stellar,, it's pretty quiet. Are you using 9Volt battery or Phantom power? If the battery it might be dead. This makes them noisy for sure.
Where is it in the signal chain?
Normally I use it after a pedal board between the amp. The XLR goes to the PA ( in your case interface) and the 1/4" out to the amp.

^^what cactus said...
check the obvious stuff, like cables, as well....

It's a few years ago, but I came across some extremely noisy DI-20s and whatever the other Behringer active DI at the time was.

A guy in my then band had a Behringer DI-20 and it was fine for live work, so another band member bought one. It pushed out something in the region of 40dB of white noise. So it was returned and swapped for another which did the same thing. A third sample was no better.

A couple of years later I picked up a single channel Behringer active DI and, again, lots and lots of hiss. Someone told me around then that he'd found the same thing so took one apart and discovered Behringer had swopped from whatever 4558(?) op-amp was in the originals to another slightly cheaper op-amp that wasn't exactly ideal for audio to put it mildly.