WordPress - reorder admin menu order - swap 2 items

https://code.tutsplus.com/articles/customizing-your-wordpress-admin--wp-24941
http://stackoverflow.com/questions/11298251/swap-array-values-with-php

function custom_menu_order($menu_ord) {
    if (!$menu_ord) return true;

    $temp           = $menu_ord[3];
    $menu_ord[3]    = $menu_ord[4];
    $menu_ord[4]    = $temp;

    return $menu_ord;

}
add_filter('custom_menu_order', 'custom_menu_order'); // Activate custom_menu_order
add_filter('menu_order', 'custom_menu_order');