foreach($authors as $author) {
$current = strtolower($author['data']->display_name[0]);
$display_name = $author['data']->display_name;
$author_profile_url = get_author_posts_url($author['ID']);
if ($last != $current) {
echo '<div class="col-sm-4"><div class="bq_s"><h2><a class"alphabit" name="' . strtoupper($current) . '">' . strtoupper($current) . '</a></h2><div class="bq_fl">';
$last = $current;
 }
 echo '<div class="bqLn"><a href="'. $author_profile_url. '">'.$display_name.'</a></div></div></div></div>';
}