Navigation

aspx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Navigation.ascx.cs" Inherits="MySitecoreSite.Sublayouts.Navigation" %>

<ul class="nav navbar-nav navbar-right">
    <asp:Repeater ID="rptMenu" runat="server">
        <itemtemplate>
            <li>
                <a href="<%# Eval("Link") %>"><%# Eval("Text") %></a>
            </li>
        </itemtemplate>
    </asp:Repeater>
</ul>

code behind

using System;
using Sitecore.Data;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace MySitecoreSite.Sublayouts
{
    public partial class Navigation : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            var menuItems = new List<NavMenuItem>();
            Database current = Sitecore.Context.Database;
            var mainContentItem = current.GetItem(new ID("{0DE95AE4-41AB-4D01-9EB0-67441B7C2450}")); // Uses GUID of main Content item
            var items = mainContentItem.GetChildren().ToList().Where(x => x.Fields["TopMenu"].ToString() == "1");

            foreach (var item in items)
            {
                menuItems.Add(new NavMenuItem
                {
                    Link = Sitecore.Links.LinkManager.GetItemUrl(item),
                    Text = item.Name,
                });
            }

            rptMenu.DataSource = menuItems;
            rptMenu.DataBind();
        }

        public class NavMenuItem
        {
            public string Link { get; set; }

            public string Text { get; set; }
        }
    }
}