<?php
function top_authors_list($number = 10) {
  $u = array();
  $authors = get_users_of_blog();
  if ($authors) {
    foreach ($authors as $author) {
      $post_count = get_usernumposts($author->user_id);
      $u[$author->user_id] = $post_count;
    }
    arsort($u);
    $i = 0;
	echo '<div class="call-out">';
    echo '<ul id="columns">' . "\n";
    foreach ($u as $key => $value) {
      $i++;
      if ($i <= $number) {
        $user = get_userdata($key);
        $author_posts_url = get_author_posts_url($key);
        $post_count = $value;
        if ($post_count > 0) {
          echo '<li><a href="' . $author_posts_url .'"><span class="category-list-item">' . $user->display_name . '</span> <span class="menu-count">' . $post_count . '</span></a></li>' . "\n";
        }
      }
    }
    echo '</ul></div>';
  }
}
?>
<?php if (function_exists('top_authors_list')) top_authors_list(10); ?>

<script>
$j=jQuery.noConflict();
var cols = 2;
var container = $j('ul#columns');
var items = container.find('li');
var itemsPerCol = Math.ceil(items.length / cols);
var stack = [];
for (var i = 0; i < itemsPerCol; i++) {
	for (var k = 0; k < cols; k++) {
	stack.push(items[i + (itemsPerCol * k)]);
	}
}
items.css({
	float:'left',
	width:Math.floor(container.width() / cols)
});

container.html(stack).append($j('<br>').css({clear:'both'}));
</script>