Need to split IR on a H25

Need to know the best way to split the 3.5mm IR output of a H25. I am mirroring one H25 to 2 separate televisions via cat5 HDMI extenders with IR and need to be able to control the H25 at both TV's with the RC70 remote. The extenders have a 3.5mm inputs for the IR and come with the eye that goes on the TV side. I have tried using a mono and stereo 3.5mm splitter but it did not work.