I do not know how to patch or edit the kext.
But, I must edit IO80211Familiy.kext to work my BCM4135 wifi card, because original kext includes these vendors IDs: 4311, 4312, 4313, 4318, 4319, 431a, 4320 etc... and my card ID is 4315 which is not included in original kext, so I simply added this ID to original IO80211Family.kext and now it is working, but only on channels 1-11.

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Dell Latitude e6500
CPU: Intel C2D T9600 @ 2,8GHz / 1066MHz / 6MB
RAM: 4GB DDR2 800 MHz
VGA: NVidia Quadro NVS 160M 256MB
Sound: (working voodooHDA)
WLAN: Dell Wireless 1510 abgn @ BCM4328
LAN:' Intel
HDD: Samsung SSD 128MB SATA-II
Screen: 15,4" 1920x1200@60Hz
Snow @ 10.6.7