code chunk generates list of posts for current category, how to alphabetize?

Howdy

Not much of a coder (obviously) but was able to modify the following (found) code so that it generates an unordered list which can be popped into a text widget and used in a sidebar, in conjunction with php-exec – works a charm

Generates an unordered list of all the posts in a current category, great for sectional navigation

Question – how can I alter this so that it generates an alphabetical list of posts?

many thx in advance

/max

<?php
if ( is_single() || is_category()) {
  $categories = get_the_category();
  if ($categories) {
    foreach ($categories as $category) {
      // echo "<pre>"; print_r($category); echo "</pre>";
      $cat = $category->cat_ID;
      $args=array(
        'cat' => $cat,
        'post__not_in' => array($post->ID),
        'posts_per_page'=>40,
        'caller_get_posts'=>1
      );
      $my_query = null;
      $my_query = new WP_Query($args);
      if( $my_query->have_posts() ) {
        echo '<h4 class="widget-title">'. $category->name . '</h4><ul>';
        while ($my_query->have_posts()) : $my_query->the_post(); ?>
          <li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
         <?php
        endwhile;
      } //if ($my_query)
    } //foreach ($categories
  } //if ($categories)
  wp_reset_query();  // Restore global post data stomped by the_post().
} //if (is_single())
?>