[WordPress] An example for how to setup tabbed navigation within a single WordPress template.

1-get-the-menu-items.php

<?php

/**
 * Retrieves a listing of the IDs for the posts that are set to display on the homepage.
 *
 * @return     array    $post_ids    A listing of the post IDs that are contained in the Pages menu.
 * @package    Acme
 */
function acme_get_homepage_posts() {

	$locations = get_nav_menu_locations();

	// Grab the menu and the menu items
	$menu = wp_get_nav_menu_object( $locations['pages-menu'] );
	$menu_items = wp_get_nav_menu_items( $menu->term_id );

	// Grab all of the post IDs that are represented in this menu
	$post_ids = array();
	foreach( $menu_items as $post ) {
		$post_ids[] = $post->object_id;
	}

	return $post_ids;

}

2-render-the-menu-items.php

<?php

/**
 * Creates the HTML element that is used to render the tabbed navigation
 * of the posts in the 'Pages' menu.
 *
 * @return     string    $html    The HTML for the tabbed navigation of the homepage.
 * @package    Acme
 */
function acme_get_tabbed_navigation() {

	// Get all of the IDs for the posts in the menu
	$post_ids = acme_get_homepage_posts();
	$count = 1;

	// Start the the data list for the tabs
	$html = '<dl class="tabs" data-tab>';

	// Iterate through the collection of post IDs to build the menu.
	foreach( $post_ids as $id ) {

		$html .= ( 1 === $count ) ?
		'<dd class="active">' :
		'<dd>';
			$html .= '<a href="#panel2-' . $id . '">';
				$html .= get_the_title( $id );
			$html .= '</a>';
		$html .= '</dd>';

		$count++;

	}

	$html .= '</dl><!-- .tabs -->';

	return $html;

}

3-render-tabbed-content.php

l<?php

/**
 * Retrieves and creates the HTML used to render the pages for the tabbed navigation
 * area of the homepage.
 *
 * @return     The HTML for each of the posts that's rendered in the 'Pages' menu
 * @package    Acme
 */
function acme_get_tabbed_content() {

	$args = array(
		'post_type'           => array( 'page' ),
		'post__in'            => acme_get_homepage_posts(),
		'post_status'         => 'publish',
		'ignore_sticky_posts' => 1,
		'orderby'             => 'menu_order',
		'order'               => 'asc'
	);
	$my_query = new WP_Query( $args );

	if ( $my_query->have_posts() ) {

		$html = '';

		while( $my_query->have_posts() ) {
			$my_query->the_post();

			$html .= '<div class="content panel" id="panel2-' . get_the_ID() . '">';
				$html .= get_the_content();
			$html .= '</div><!-- .content.panel -->';

		}
		wp_reset_postdata();

	}

  return $html;
	
}