Hello i need help for navigation menu

By raio
http://community.elgg.org/

First I apologize for my broken english. ELGG Since a new system for me yet I can not namarya files that I need. Would you share where the navigation menu? You should change your diet but did not know exactly where to find it? I will ask you not to give your plugin and tell me where exactly is the file. I write well php js jquery css as (flash) and decided to improve its sistemkata. I like it very intelligently written and I hope to help the system after time :) Thank you in advance