If you wish to replace the tags aux option with authors, then all you need to do is add the following code to your child theme functions.php file:
function sf_blog_aux($width) {
$blog_aux_output = "";
$options = get_option('sf_dante_options');
$filter_wrap_bg = $options['filter_wrap_bg'];
$rss_feed_url = $options['rss_feed_url'];
$category_list = wp_list_categories('sort_column=name&title_li=&depth=1&number=10&echo=0&show_count=1');
$archive_list = wp_get_archives('type=monthly&limit=12&echo=0');
$tags_list = wp_tag_cloud('smallest=12&largest=12&unit=px&format=list&number=50&orderby=name&echo=0');
$author_list = wp_list_authors('echo=0');
$blog_aux_output .= '<div class="blog-aux-wrap row">'; // open .blog-aux-wrap
$blog_aux_output .= '<ul class="blog-aux-options bar-styling '.$width.'">'; // open .blog-aux-options
// CATEGORIES
$blog_aux_output .= '<li><a href="#" class="blog-slideout-trigger" data-aux="categories"><i class="ss-index"></i>'.__("Categories", "swiftframework").'</a>';
// AUTHORS
$blog_aux_output .= '<li><a href="#" class="blog-slideout-trigger" data-aux="authors"><i class="ss-user"></i>'.__("Authors", "swiftframework").'</a>';
// SEARCH FORM
$blog_aux_output .= '<li class="search"><form method="get" class="search-form" action="'. home_url().'/">';
$blog_aux_output .= '<input type="text" placeholder="'. __("Search", "swiftframework") .'" name="s" />';
$blog_aux_output .= '</form></li>';
// ARCHIVES
$blog_aux_output .= '<li><a href="#" class="blog-slideout-trigger" data-aux="archives"><i class="ss-storagebox"></i>'.__("Archives", "swiftframework").'</a>';
// RSS LINK
if ($rss_feed_url != "") {
$blog_aux_output .= '<li><a href="'.$rss_feed_url.'" class="rss-link" target="_blank"><i class="fa-rss"></i>'.__("RSS", "swiftframework").'</a>';
}
$blog_aux_output .= '</ul>'; // close .blog-aux-options
$blog_aux_output .= '</div>'; // close .blog-aux-wrap
$blog_aux_output .= '<div class="filter-wrap slideout-filter blog-filter-wrap row clearfix">'; // open .blog-filter-wrap
$blog_aux_output .= '<div class="filter-slide-wrap col-sm-12 alt-bg '.$filter_wrap_bg.'">';
if ($category_list != '') {
$blog_aux_output .= '<ul class="aux-list aux-categories row clearfix">'.$category_list.'</ul>';
}
if ($author_list != '') {
$blog_aux_output .= '<ul class="aux-list aux-authors row clearfix">'.$author_list.'</ul>';
}
if ($archive_list != '') {
$blog_aux_output .= '<ul class="aux-list aux-archives row clearfix">'.$archive_list.'</ul>';
}
$blog_aux_output .='</div></div>'; // close .blog-filter-wrap
/* AUX BUTTONS OUTPUT
================================================== */
return $blog_aux_output;
}
– Ed