Using the Wizard control as a sidebar navigator
You can easily transform the Wizard control as a sidebar navigator by simply hiding the navigation buttons at the bottom as shown below.

To do this, add a Wizard control to your page. Under "Wizard Tasks", convert the StartNavigation, StepNavigation and FinishNavigation contents to templates. View the source of the page and make the navigation buttons hidden.
<asp:Wizard ID="Wizard1" runat="server" ActiveStepIndex="0">
<StartNavigationTemplate>
<asp:Button ID="StartNextButton" runat="server" CommandName="MoveNext" Text="Next"
Visible="false"/>
</StartNavigationTemplate>
<StepNavigationTemplate>
<asp:Button ID="StepPreviousButton" runat="server" CausesValidation="False" CommandName="MovePrevious"
Text="Previous" Visible="false"/>
<asp:Button ID="StepNextButton" runat="server" CommandName="MoveNext" Text="Next"
Visible="false"/>
</StepNavigationTemplate>
<WizardSteps>
<asp:WizardStep runat="server" Title="Step 1">
</asp:WizardStep>
<asp:WizardStep runat="server" Title="Step 2">
</asp:WizardStep>
</WizardSteps>
<FinishNavigationTemplate>
<asp:Button ID="FinishPreviousButton" runat="server" CausesValidation="False" CommandName="MovePrevious"
Text="Previous" Visible="False"/>
<asp:Button ID="FinishButton" runat="server" CommandName="MoveComplete" Text="Finish"
Visible="false"/>
</FinishNavigationTemplate>
</asp:Wizard>
You can now start adding controls into each "wizard step".
Make sure validators, if any, are assigned a unique ValidationGroup to prevent them from being fired when you click on wizard step on the sidebar.