How can I modify a Simple Page listing on homepage to act as a link?

I'd like to add a link underneath my current list of Simple Page plugin pages that takes me to another site (to a blog about my Omeka archive). It would be nice to achieve this via the Simple Page plugin since that gives me an interface to change the name and order of the link (I don't know PHP). Is there some PHP code I can put on my Simple Page to achieve this? Is there a better way? Many thanks.

I can see a couple different approaches to this that might work better than trying to force SimplePages into producing an external link.

One is to edit the /common/header.php file to directly add the HTML link in the navigation div. That, however, would put the link above the Simple Pages links, rather than below it.

Two make it appear below the Simple Pages links, you could add the following hack to the function called simple_pages_public_navigation_main in the functions.php file in SimplePages:

Add your link betweeen the loop and the return value:

foreach($navLinks as $text => $uri) {
        $nav[$text] = $uri;
    }
//your link
    $nav['My link text'] = 'http://example.com';

    return $nav;

That should do it, but is a bit sketchy because whenever SimplePages updates it will overwrite that change.

A more stable approach would be to create a really simple plugin that does nothing but add those links to the navigation. It'd just need a plugin.ini file and a plugin.php file that does this:

add_filter('public_navigation_main', 'my_additional_nav');

function my_additional_nav($nav) {
//your link
    $nav['My link text'] = 'http://example.com';

    return $nav;
}

Ah, terrific - it works! Thank you very much.