wordpress - list custom posts by taxonomy term

<?php
                    $post_type = 'menus';
                    $tax = 'menu-type';
                    $tax_terms = get_terms($tax,'hide_empty=0');



                    //list everything
                    if ($tax_terms) {
                      foreach ($tax_terms  as $tax_term) {
                        $args=array(
                          'post_type' => $post_type,
                          "$tax" => $tax_term->slug,
                          'post_status' => 'publish',
                          'posts_per_page' => -1,
                          'caller_get_posts'=> 1
                        );

                        $my_query = null;
                        $my_query = new WP_Query($args);
                        if( $my_query->have_posts() ) {
                          echo "<h2 class=\"category-title\" > $tax_term->name </h2><ul class=\"page-listing\">";
                          while ($my_query->have_posts()) : $my_query->the_post(); ?>
                            <li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
                            <?php
                          endwhile;


                        }echo "</ul>";
                        wp_reset_query();
                      }
                    }
                    ?>