Wi-fi very rarely works on hackintosh setups you will have to find a driver/kext for your wifi card. If you're on a laptop this is extremely difficult. For my hackintosh setup i got it to work
You could swap your wifi card for a compatible one. I can't recall the exact one I used, but it was out of an older compaq notebook. Check out google for hackintosh wifi cards. It's a rather easy install. About as simple as swapping one in a desktop. Have a look at the osx86 wki for compatible USB adapters too. I used an old, cheap dlink adapter that was like ten bucks at the time, which was a few years ago.
I hope I post this correctly, but i have found a workaround for the lack of wireless. If you have an iDevice, which i assume you do, get MyWi, enable USB tethering and connect it to your computer, the OS will recognize it and if your iDevice is on WiFi, it will share it with the computer. This way, you spend much less money and can still use the computer without doing any hardware modding. This works for me, since i keep my iPod on my all the time anyway. Hope this helps.