I am using a nested repeater to generate an unordered list for my site navigation. The problem I have is that I want to generate the following structure.
[list]
<li> item 1 </li>
<li> item 2
[list]
<li>item 2-1 </li>
<li>item 2-2 </li>
<li>item 2-3 </li>
</ul>

</li>

<li>item 3 </li>
</ul>


However what I am getting is [list]
<li> item 1 [list]
</ul>
</li>
<li> item 2
[list]
<li>item 2-1 </li>
<li>item 2-2 </li>
<li>item 2-3 </li>
</ul>

</li>

<li>item 3 [list]
</ul>
</li>
</ul>

Basically the nested child repeater is still writing out its header and footer resulting in[list] </ul> to be generated for every sub item. This means that for every item in my navigation that does not have sub items I still get a drop down due to the[list] and </ul> header and footer tags in the childRepeater. Is there any way I can stop this.

Here's my code. The following runs onLoad of the page.
Sub PopulateMenu()
        Const connectionString As String = "SERVER=localhost;DATABASE=db;Integrated Security=True"

        Dim con As New SqlClient.SqlConnection(connectionString)
        Dim dadCats As New SqlClient.SqlDataAdapter("SELECT tNav.[Nav1ID], tNav.Title, tNav.URL FROM tblNav1 AS tNav ORDER BY tNav.SequenceID", con)
        Dim dadSubCats As New SqlClient.SqlDataAdapter("SELECT tNav.[Nav1ID], tNav.[Nav2ID], tNav.Title, tNav.URL FROM tblNav2 AS tNav ORDER BY tNav.SequenceID", con)

        Dim dst As New DataSet()
        dadCats.Fill(dst, "Sections")
        dadSubCats.Fill(dst, "Categories")


        dst.Relations.Add("Children", _
        dst.Tables("Sections").Columns("Nav1ID"), _
        dst.Tables("Categories").Columns("Nav1ID"))

        parentRepeater.DataSource = dst.Tables("Sections")
        parentRepeater.DataBind()

    End Sub


 Protected Sub parentRepeater_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles parentRepeater.ItemDataBound
        Dim item As RepeaterItem = e.Item
        If item.ItemType = ListItemType.Item Or item.ItemType = ListItemType.AlternatingItem Then
            Dim childRepeater As Repeater = item.FindControl("childRepeater")
            Dim drv As DataRowView = item.DataItem
            childRepeater.DataSource = drv.CreateChildView("children")
            childRepeater.DataBind()
        End If


And in the presentation layer
[list]

<asp:repeater id="parentRepeater" runat="server" OnItemDataBound="parentRepeater_ItemDataBound">
<itemtemplate>
        <li><a href='/sections_<%# Container.DataItem("Nav1ID") %>.aspx' class="nav_separator"><%#DataBinder.Eval(Container .DataItem, "Title")%></a>

             <asp:repeater id="childRepeater" runat="server">
                <HeaderTemplate>
                    [list]
                </HeaderTemplate>
                <itemtemplate>
                       <li><a href='/categories_<%# Container.DataItem("Nav1ID") %>_<%# Container.DataItem("Nav2ID") %>.aspx'><%# Container.DataItem("Title") %></a></li>
                </itemtemplate>
                <FooterTemplate>
                    </ul>
                </FooterTemplate>

            </asp:Repeater>

        </li>
    </itemtemplate>

</asp:Repeater>
</ul>