Alters theme operation links.
$theme_groups: An associative array containing groups of themes.
function hook_system_themes_page_alter(&$theme_groups) {
foreach ($theme_groups as $state => &$group) {
foreach ($theme_groups[$state] as &$theme) {
// Add a foo link to each list of theme operations.
$theme->operations[] = array(
'title' => t('Foo'),
'href' => 'admin/appearance/foo',
'query' => array(
'theme' => $theme->name,
),
);
}
}
}