How can i manimulate the pages added in admin side of wordpress?

I have added two pages through admin side(About us, privacy policy)

How can i show the 'About us' link in header section and 'privacy policy' link i the footer开发者_运维知识库 section of client side, dynamically

That really depends on the theme you are using. For example, themes can use wp_list_pages or (in WP3.0) wp_nav_menu to automatically list all or some pages on your site, the latter having a page on the admin side of things where you can choose which pages you want in each menu defined in the theme.