Look around for a TV remote control extender, which is a gadget that uses a sensor at the one tv, a radio link, and an infrared emitter at the other TV or device you want to control.
One possibility available on Amazon:
Put the receiver part near the TV that you want to control the DVR from, and aim the emitter part at your DVR's sensor from close range...the wireless part will work through the walls...
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.