Ok,
having looked at the site I would recommend that the changes are done via server side. I assume the htaccess file is been used to to parse category/subcategory/productname to a controller. Within that controller if the product is found clean the product name with the function below test it against the given url and do a 301 redirect to the cleaned name if they do not match
function clean_name($string) { $non_acceptable = '#[^-a-zA-Z0-9 ]#'; $string = preg_replace($non_acceptable, '', $string); $string = trim($string); $string = preg_replace('#[-_ ]+#', '-', $string); return $string; }
