// Allow editors to see Appearance menu
$role_object = get_role( 'editor' );
$role_object->add_cap( 'edit_theme_options' );
function hide_menu() {
 
    // Hide theme selection page
    remove_submenu_page( 'themes.php', 'themes.php' );
 
    // Hide widgets page
    remove_submenu_page( 'themes.php', 'widgets.php' );
 
    // Hide customize page
    global $submenu;
    unset($submenu['themes.php'][6]);
 
}
 
add_action('admin_head', 'hide_menu');