ElggMenuItem::setSelected PHP Method

    public function setSelected($state = true)
    {
        $this->data['selected'] = $state;
    }

/**
 * Add a menu item to the user ownerblock
 */
function markdown_wiki_owner_block_menu($hook, $type, $return, $params)
{
    if (elgg_instanceof($params['entity'], 'user')) {
        $url = "wiki/owner/{$params['entity']->username}";
        $item = new ElggMenuItem('markdown_wiki', elgg_echo('markdown_wiki'), $url);
        $return[] = $item;
    } else {
        if ($params['entity']->markdown_wiki_enable != "no") {
            if ($params['entity']->markdown_wiki_all_enabled == 'on') {
                $url = "/wiki/group/{$params['entity']->guid}/all";
            } else {
                $url = "wiki/group/{$params['entity']->guid}/page/" . elgg_echo('markdown_wiki:home');
            }
            $item = new ElggMenuItem('markdown_wiki', elgg_echo('markdown_wiki:group'), $url);
            if (elgg_in_context('wiki')) {
                $item->setSelected();
            }
            $return[] = $item;
        }
    }
    return $return;
}