That is the legacy code produced by default implementation of Web part zone in ASP.NET. MonoX includes a different tableless Web part zone, so please just use it in the Web part zone declaration on your page.

You can code it in something like this..
Header information of course needs to be your own..

<%@ Page
Language="C#"
AutoEventWireup="True"
CodeBehind="Default.aspx.cs"
Inherits="TheScene.Web.Default"
Theme="Scene2"
MasterPageFile="/MonoX/MasterPages/ThePittsburghSceneHeader2.master"
%>

<%@ MasterType TypeName="MonoSoftware.MonoX.BaseMasterPage" %>

<%@ Import Namespace="MonoSoftware.MonoX.Resources" %>
<%@ Register Assembly="MonoX" Namespace="MonoSoftware.MonoX" TagPrefix="portal" %>


<asp:Content ID="Content1" ContentPlaceHolderID="cp" runat="server">

<portal:PortalWebPartZone HeaderText='LeftFooterZone' ID="LeftFooterZone" runat="server" Width="100%" ChromeTemplateFile="">
<ZoneTemplate>
</ZoneTemplate>
</portal:PortalWebPartZone>

</asp:Content>

Oh ya, and remember... if your changing this on a existing page to reset zone personalization via the monox admin panel.
If you find weird error that refers to something about zone personalizations.

from my experience, changing code like this often requires the zone personalization's for the specific page to be reset via the MonoX Admin panel