PHP CI Framework GUI Development

Repost: I have a project to finish up. Its a Voip billing GUI in PHP using CodeIgniter framework. Currently it is 50% complete, just need to finish up some front-end work and create a php connector to Perl script [login to view URL] file. Core Billing application is developed in Perl, all that is required is to replace existing CGI GUI with PHP using CodeIgniter Framework. Perl [login to view URL] script: This file is has the heart of the VoIP billing application as it has the database connection code and logic. Currently there is an existing GUI in CGI which you can use to see how its communicating with Perl [login to view URL] file. My goal is to replace old CGI GUI with PHP. I have a time frame of 1 week. Budget is 800 dollars. If you have experience in asterisk, freeswitch and voip billing this will be an advantage..