<?php

    $companyNav = wp_get_nav_menu_items('Primary Navigation');
    var_dump($companyNav);
    foreach ( $companyNav as $navItem ) :
      //var_dump($navItem);
      // item does not have a parent so menu_item_parent equals 0 (false)
      if ( !$navItem->menu_item_parent ):
        echo '<li>';
          echo '<a href="'.$navItem->url.'" title="'.$navItem->title.'">'.$navItem->title.'</a>'; //</a>
          echo '<ul class="sub-menu">';//<ul>
            foreach ( $companyNav as $submenuNavItem ) :
              if ( $submenuNavItem->menu_item_parent == $navItem->ID ):

                  echo '<li>';
                    echo '<a href="'.$submenuNavItem->url.'" title="'.$submenuNavItem->title.'">'.$submenuNavItem->title.'</a>'; //</a>
                    echo '<ul class="sub-menu">';
                      echo '<li>';
                      foreach ( $companyNav as $tertiaryNavItem ) :
                        if ( $tertiaryNavItem->menu_item_parent == $submenuNavItem->ID ):
                          echo '<a href="'.$tertiaryNavItem->url.'" title="'.$tertiaryNavItem->title.'">'.$tertiaryNavItem->title.'</a>';
                        endif;//$tertiaryNavItem->menu_item_parent == $submenuNavItem->ID
                      endforeach;//$companyNav as $tertiaryNavItem
                      echo '</li>';
                    echo '</ul>';
                  echo '</li>';
              endif;//$submenuNavItem->menu_item_parent == $navItem->ID
            endforeach;//$companyNav as $submenuNavItem
          echo '</ul>';// </ul>
        echo '</li>';// li-1
      endif;//!$navItem->menu_item_parent
    endforeach;//$companyNav as $navItemarray_unique (
  ?>