The simplest method is to use a TLE2426 ?Rail Splitter. It provides the virtual ground or 1/2 the power applied across it. I attached a data sheet. It's also the method I'd use. An ICL7660 requires too many parts as do all the other answers. The ICL 7106 isn't that critical for power supply accuracy but the ground must be 1/2 Vcc.
I used a lot of the LCD version for DPM for soil testing devices and I used a 741 to provide the virtual ground. The problem exists because the input ground is at 1/2 Vcc nnot the absolute 0 voltage point. That's what the TLE2426 does, just supply a half Vcc point or "ground'. I also attached the ICL7660 and 7105 - 6 data sheets.
Bob
TLE2426.pdf (670 KB)
ICL7660-MAX1044.pdf (117 KB)
ICL7105_6.pdf (548 KB)