Dynamic Navigation using CSV

[bobscape]

I want to build a dynamic navigation system but do not have access to a database.

This means i need to use something like a CSV file to store all the details.

The navigation needs to work in a breadcrumb like fashion found on the BBC sports web site. This means:
a. The navigation shows all of the current pages parents
b. The navigation shows all the current pages children
c. The current page is highlighted
d. At the very bottom level you can see the current pages siblings as well as parents.

Any ideas?

Thanks in advanced

[devinemke]

just multidimensional arrays to create the tree structure you want.

$nav = array(
'page1' => array('subpage1','subpage2','subpage3'),
'page2' => array('subpage1','subpage2','subpage3'),
'page3' => array('subpage1','subpage2','subpage3'),
// etc...
);

[bobscape]

thats great, the problem is that this needs to be readable and editable but a non-techie. Hence the request to use a CSV file.

Any idea on the structure of such a file and how to output the navigation from it.

Thanks