Mercator - Add Site Settings Tab

mercator_add_site_settings_tab.php

add_filter( 'network_edit_site_nav_links', 'mercator_add_settings_tab' );
 
function mercator_add_settings_tab( $tabs ) {

    // add a new tab to the Edit Site area for Sites
    $tabs['mercator-aliases-nav-link'] = array(
        'label' => 'Aliases',
        'url' => 'admin.php?action=mercator-aliases',
        'cap' => 'manage_sites'
    );

    return $tabs;
}