To add 2 tabs, use this sort of code in your theme's qa-theme.php file:
<?php
class qa_html_theme extends qa_html_theme_base
{
function nav_list($navigation, $navtype)
{
if ($navtype=='main') {
$navigation['custom_1']=array( 'url' => 'http://your-page/', 'label' => 'your-label');
$navigation['custom_2']=array( 'url' => 'http://your-other-page/', 'label' => 'your-other-label');
}
qa_html_theme_base::nav_list($navigation, $navtype);
}
}
?>
As for reordering, you would need to rebuild the array from scratch in the right order, so the final code would be something like this:
<?php
class qa_html_theme extends qa_html_theme_base
{
function nav_list($navigation, $navtype)
{
if ($navtype=='main') {
$oldnavigation=$navigation;
// add the first ones in explicit order
$navigation['questions']=$oldnavigation['questions'];
$navigation['custom_1']=array( 'url' => 'http://your-page/', 'label' => 'your-label');
$navigation['tag']=$oldnavigation['tag'];
$navigation['custom_2']=array( 'url' => 'http://your-other-page/', 'label' => 'your-other-label');
// add on any remaining ones
foreach ($oldnavigation as $key => $navlink)
if (!isset($navigation[$key]))
$navigation[$key]=$oldnavigation[$key];
}
qa_html_theme_base::nav_list($navigation, $navtype);
}
}
?>