function plt_hide_jquery_post_splitter_menus() {
//Hide the "Posts → Post Splitter" menu.
remove_submenu_page('edit.php', 'jpsoptions');
//Hide the "Pages → Page Splitter" menu.
remove_submenu_page('edit.php?post_type=page', 'jpsoptions');
//Hide the "Settings → jQuery Post Splitter" menu.
remove_submenu_page('options-general.php', 'jpsoptions');
}
add_action('admin_menu', 'plt_hide_jquery_post_splitter_menus', 11);