function exclude_post_categories($excl='', $spacer=''){
   $categories = get_the_category($post->ID);
      if(!empty($categories)){
        $exclude=$excl;
        $exclude = explode(",", $exclude);
        foreach ($categories as $child){
          $parents = get_category_parents($child->cat_ID, FALSE, ',');
          $parents = explode(',', $parents);
          foreach($exclude as $excluded){
           if (in_array($excluded, $parents)){
               $excluded_children[] = $child->cat_ID;
           }
          }
        }
        $thecount = count(get_the_category()) - count($excluded_children);
        foreach ($categories as $cat) {
            $html = '';
            if(!in_array($cat->cat_ID, $excluded_children)) {
                $html .= '<a href="' . get_category_link($cat->cat_ID) . '" ';
                $html .= 'title="' . $cat->cat_name . '">' . $cat->cat_name . '</a>';
                if($thecount>1){
                    $html .= $spacer;
                }
            $thecount--;
            echo $html;
            }
          }
      }
}