function plt_hide_gratisfaction_social_contests_referral_loyalty_rewards_program_by_appsmav_menus() {
//Hide the "Settings → Gratisfaction" menu.
remove_submenu_page('options-general.php', 'grappsmav');
}
add_action('admin_menu', 'plt_hide_gratisfaction_social_contests_referral_loyalty_rewards_program_by_appsmav_menus', 11);