WPML menu dropdown for twitter-bootstrap theme

function wpml_menu_dropdown_custom_scripts() {
    ?>
    <script>
    ( function( $ ) {
        $(document).ready(function() {
            $('li.menu-item-language-current a').attr({'data-toggle':'dropdown', 'class': "dropdown-toggle", 'aria-haspopup':'true'});
            $('li.menu-item-language-current').find('ul.sub-menu').addClass('dropdown-menu');
        });
        }
    )( jQuery )
    </script>
    <?php
}
add_action( 'wp_head', 'wpml_menu_dropdown_custom_scripts');