PHP Script to export mysql database script, obfuscating some tables

I need a script to run on a server to export a mysql 5.1 database, but it needs to obfuscate some table columns in the export (to hide sensitive data - like changing a real phone # such as 212-555-1212 to a random one [each row being different]). This should be available installed on a server via URL (no parameters), provide the obfuscated export (as a SQL file that can be run like mysqldump) gzipped. Please let me know what your approach to this would be along with the bid. SQL/PHP are on the server already. Please state with your bid if anything else will need to be installed. 76 total tables to export, 10 columns among them to obfuscate. Thanks!