function plt_hide_option_tree_menus() {
//Hide "Appearance → Theme Options".
remove_submenu_page('themes.php', 'ot-theme-options');
//Hide "OptionTree".
remove_menu_page('ot-settings');
//Hide "OptionTree → Settings".
remove_submenu_page('ot-settings', 'ot-settings');
//Hide "OptionTree → Documentation".
remove_submenu_page('ot-settings', 'ot-documentation');
}
add_action('admin_menu', 'plt_hide_option_tree_menus', 101);