/// <summary>
    /// Lấy danh sách các nhóm
    /// </summary>
    /// <returns></returns>
    private string GetGroups(string position)
    {
        string s = "";
        string fields = "", condition = "", orderby = "";

        condition = DataExtension.AndConditon(
            GroupsTSql.GetByParams(position),
            GroupsTSql.GetByEnable("1"),
            GroupsTSql.GetByApp(appGroup),
            GroupsTSql.GetByLang(lang)
            );
        fields = DataExtension.GetListColumns(
            GroupsColumns.IgidColumn,
            GroupsColumns.VgnameColumn,
            GroupsColumns.VgimageColumn,
            GroupsColumns.VGSEOLINKSEARCHColumn,
            GroupsColumns.IgtotalitemsColumn
            );
        orderby = GroupsColumns.IgorderColumn;
        DataTable dt = Groups.GetGroups("", fields, condition, orderby);

        if (dt.Rows.Count > 0)
        {
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                string list     = "";
                string cateName = "";
                list = GetList(dt.Rows[i][GroupsColumns.IgidColumn].ToString(), "5");
                // tieu de
                string link = "", name = "";
                link = (UrlExtension.WebisteUrl + dt.Rows[i][GroupsColumns.VGSEOLINKSEARCHColumn] + RewriteExtension.Extensions).ToLower();
                name = dt.Rows[i][GroupsColumns.VgnameColumn].ToString();
                if (list.Length > 0)
                {
                    ltrList.Text = @"
                    <div class='main-right'>
                        <span class='btn-comp01 fade-up'><b>" + name + @"</b></span>
                        <div class='list-news03'>
                        " + list + @"
                        </div>
                    </div>";
                }
            }
        }
        return(s);
    }