Create a custom menu in WordPress
The first step is to login to your Dashboard → Appearance → Menus. By going to the Menus page you should see something like this:
Now look to the left of your screen in your Dashboard and you should see the boxes in Images B & C. Image B features a list of pages created within your WordPress for easy access to linking those pages via your new menu.
And Image C you’ll see how you can create your own custom link outside of your WordPress installation instead of using the suggested pages or categories.
Your menu screen should look something like Image D now that you’ve begun adding your links/pages.
Last but not least, before you save your menu be sure to check the following box below shown in Image E:
**click images for full resolution