add_filter('wp_nav_menu_objects', 'mkmcst_hide_manage_menu_item', 10, 2);
function mkmcst_hide_manage_menu_item($items, $args) {
if (!is_user_logged_in()) {
foreach ($items as $key => $item) {
// Target the 'manage' link by URL
if ($item->url == 'https://plimothtoday.com/manage/') {
unset($items[$key]);
}
}
}
return $items;
}