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;
      		}
	      }
      }
}