Accessing PHP code?

[TolleArt]

I am helping a friend customize the software.  I was able to figure out how to modify items within the HTML code but I can't figure out how to access the PHP code from the admin control panel.  Do I need to use a tool like phpMyAdmin or some other tool?  I want make some changes to how the navigation looks and need to access Paging. 

Thx in advance for any help!

[V@no]

Hello and welcome to 4images forum.

You'll need use FTP client, download the file to your computer and then upload it back to the server.
Or you might find a text editor with FTP support build-in.