CustomLinkUrl.cs

public class CustomLinkUrl : Sitecore.Xml.Xsl.LinkUrl  
{
  protected override string GetInternalUrl(Database database, string url, string itemID, string anchor, string queryString)
  {
    Assert.ArgumentNotNull(database, "database");
    Assert.ArgumentNotNull(url, "url");
    Assert.ArgumentNotNull(itemID, "itemID");
    Assert.ArgumentNotNull(anchor, "anchor");
    Assert.ArgumentNotNull(queryString, "queryString");

    Item obj = database.Items[url] ?? database.Items[itemID];

    if (obj == null)
      return string.Empty;
    if (obj.Paths.IsMediaItem)
      return GetMediaUrl(database, itemID);
      
    return LinkManager.GetItemUrl(obj, XslHelper.GetUrlOptions()) + anchor + this.GetQueryString(queryString);
  }        
}