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<h2 id='authors'>Authors</h2>
<ul>
<?php
wp_list_authors(
  array(
    'exclude_admin' => false,
  )
);
?>
</ul>

<h2 id='pages'>Pages</h2>
<ul>
<?php
// Add pages you'd like to exclude in the exclude here
wp_list_pages(
  array(
    'exclude' => '',
    'title_li' => '',
  )
);
?>
</ul>

<h2 id='posts'>Posts</h2>
<ul>
<?php
// Add categories you'd like to exclude in the exclude here
$cats = get_categories('exclude=');
foreach ($cats as $cat) {
  echo '<li><h3>'.$cat->cat_name.'</h3>';
  echo '<ul>';
  query_posts('posts_per_page=-1&cat='.$cat->cat_ID);
  while(have_posts()) {
    the_post();
    $category = get_the_category();
    // Only display a post link once, even if it's in multiple categories
    if ($category[0]->cat_ID == $cat->cat_ID) {
      echo '<li><a href="'.get_permalink().'">'.get_the_title().'</a></li>';
    }
  }
  echo '</ul>';
  echo '</li>';
}
?>
</ul>

<?php // Custom Post Type Support
foreach( get_post_types( array('public' => true) ) as $post_type ) {
  if ( in_array( $post_type, array('post','page','attachment') ) )
    continue;

  $pt = get_post_type_object( $post_type );

  echo '<h2>'.$pt->labels->name.'</h2>';
  echo '<ul>';

  query_posts('post_type='.$post_type.'&posts_per_page=-1');
  while( have_posts() ) {
    the_post();
    echo '<li><a href='.get_permalink().'>'.get_the_title().'</a></li>';
  }

  echo '</ul>';
} ?>