check current_theme_supports in admin_menu hook

Not really sure what you’re asking here, but this allows theme support for navigation menus in your theme.

Place this block of code in your theme’s functions.php file.

if(function_exists('register_nav_menus')){
    register_nav_menus(
        array(
            'header_navigation' => 'Header Navigation',
            'main_navigation' => 'Main Navigation',
            'footer_navigation' => 'Footer Navigation'
        )
    );
}