FieldType.DropDownList.cshtml

@using System.Text;
@model Umbraco.Forms.Mvc.Models.FieldViewModel

@if (Model.Value!= null){

            List<string> cols = new List<string>();
            List<string> rows = new List<string>();

                foreach (Umbraco.Forms.Mvc.Models.PrevalueViewModel item in Model.PreValues)
                {
                    string itemStr = item.Value.ToString();
                    if (itemStr.Contains("[a]"))
                    {
                        cols.Add(itemStr.Replace("[a]", ""));
                    }
                    else if (itemStr.Contains("[q]") || itemStr.Contains("[h]"))
                    {
                        rows.Add(itemStr.Replace("[q]", ""));
                    }
                }



            StringBuilder sb = new StringBuilder();
            sb.Append("<table class=\"matrix_control\">");
            sb.Append("<thead>");
            sb.Append("<tr>");
            sb.Append("<td><h6></h6></td>");
            foreach (string colPreval in cols)
            {
                sb.Append(string.Format("<td><h6>{0}</h6></td>", colPreval));
            }
            sb.Append("</tr>");
            sb.Append("</thead>");
            sb.Append("<tbody>");
            foreach (string rowPreval in rows)
            {
                if (rowPreval.Contains("[h]"))
                {
                    sb.Append(string.Format("<tr><td colspan=\"{0}\"><span>{1}</span></td></tr>", cols.Count + 1, rowPreval.Replace("[h]", "")));
                }
                else
                {
                    sb.Append("<tr>");
                    sb.Append(string.Format("<td><span>{0}</span></td>", rowPreval));
                    Guid group = Guid.NewGuid();
                    for (int i = 0; i < cols.Count; i++)
                    {
                        sb.Append(string.Format("<td><input type=\"radio\" name=\"{0}\" /></td>", group));
                    }
                    sb.Append("</tr>");
                }

            }
            sb.Append("</tbody>");
            sb.Append("</table>");
            <div>@Html.Raw(sb.ToString())</div>
}