public static IEnumerable<SelectListItem> GetFactionItems(this HtmlHelper html, int factionID, Expression<Func<Faction, bool>> filter = null) {
var ret = new ZkDataContext().Factions.AsQueryable().Where(x => !x.IsDeleted);
if (filter != null) ret = ret.Where(filter);
return ret.Select(x => new SelectListItem { Text = x.Name, Value = x.FactionID.ToString(), Selected = x.FactionID == factionID });
}