How to remove a program/page from your WordPress Menu
Log in to your WordPress account. Hold the mouse pointer over your username in the upper right corner of the window, and then point to the blog’s name in the drop-down menu that opens. Click the “Dashboard” link that appears next to the blog name.
Point your mouse cursor at the “Appearance” button in the left sidebar and select “Menus” from the list that opens to the right of the Appearance button.
Locate the page you want to remove in the menu. Click on the triangle to the right of the page name. Click the “Remove” link at the bottom left of the box that opens below the page title bar.
Click the blue “Save Menu” button at the top or bottom of the menu box to commit these changes to your site.