[Plugin: List category posts] How to group articles in all categories by the A, B, C… groups

Display all posts in alpha order

<?php
$args=array(
  'orderby' => 'title',
  'order' => 'ASC',
  'posts_per_page'=>-1,
  'caller_get_posts'=>1
);
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
  echo 'Alphabetic index of all ' . count($my_query->posts) . ' posts';
  while ($my_query->have_posts()) : $my_query->the_post();
    $this_char = strtoupper(substr($post->post_title,0,1));
    if ($this_char != $last_char) {
      $last_char = $this_char;
      echo '<h2>'.$last_char.'</h2>';
    } ?>
    <p><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></p>
    <?php
  endwhile;
} //if ($my_query)
wp_reset_query();  // Restore global post data stomped by the_post().
?>

Thanks MichealH, please advice me the code need in post/page to appear the posts in groups. For example:
LIST OF POST
A:
post 1
post 2
B:
post 1
post 2
…
Z:
post 1
post 2

Thanks for your advice

Yep, that’s what that code does.

This works great, but is there any way to link to a certain letter? For example, if there was an A-Z list and you clicked on C, it would jump down to where the C’s start. Or if you clicked on Z it would take you to the page that Z starts on?