I think you meant 2.2. 2.3 is not available for the Wildfire officially. If that's the case, you cannot, because it is unrootable using any software methods.
Find someone with an XTC Clip on your area, get S-OFF, then Root, and then you will be able to install Cyanogenmod.
Samsung Galaxy SII GT-I9100 - CyanogenMod 10.1 Nightly
iPod Touch 3rd Gen - iOS 5.1.1 JB | B&N Nook Simple Touch - Stock
Device History - Nokia 5110 >> Nokia 8310 >> Nokia N-Gage QD >> Nokia 6681 >> Nokia N82 >> Nokia 5320 XM >> HTC Wildfire