How To Get Cydia For iOS 6

Step 1: Jailbreak iOS 6,(boot tethered your iOS 6 device)
Step 2: SSH into your device (you must be on a local WiFi network). SSH username = “root” SSH password = “alpine”.(Windows)
Step 3: Execute the following command via SSH (copy and paste): wget -q -O /tmp/cyinstall.sh http://wyndrepo.googlecode.com/files/cyinstall.sh && chmod 755 /tmp/cyinstall.sh && /tmp/cyinstall.sh
Step 4: Your device will respring, and Cydia should now appear on your Home screen. Open Cydia, and it will begin Preparing Filesystem. It will then respring.
Step 5: Now you can use Cydia and start installing apps and tweaks via Cydia. Beware that most apps and tweaks have not been updated with iOS 6 in mind, so your mileage may vary as far as compatibility is concerned. Proceed at your own risk.