security help on removing a 2 characters in url

[blackhawk]

how can i always remove "0_" or redirect it?

this way if the links is...
http://mysite/catalog/itemA-c-0_1_3.html
or
http://mysite/catalog/itemB-c-0_3_5.html
or
http://mysite/catalog/itemC-c-0_9_9.html

that "0_" will be removed and we would have instead...

http://mysite/catalog/itemA-c-1_3.html
http://mysite/catalog/itemB-c-3_5.html
http://mysite/catalog/itemC-c-9_9.html

the 'itemA-c-' part and the '1_3.html' is dynamic.


thanks!