get_first_sub_tab_key( $tab_key ); $sub_tab = ! ! $first_sub_tab ? $first_sub_tab : ''; $sub_tabs = $panel->get_sub_tabs( $tab_key ); $url = $panel->get_nav_url( $the_page, $tab_key, $sub_tab, $parent_page ); $is_opened = $current_tab === $tab_key; $has_submenu = $current_tab !== $tab_key && $sub_tabs; ?>