February 12, 2011 
Definition:
function wp_get_associated_nav_menu_items( $object_id = 0, $object_type = 'post_type' ) {}
Get the menu items associated with a particular object.
Parameters
- int $object_id: The ID of the original object.
- string $object_type: The type of object, such as “taxonomy” or “post_type.”
Return values
returns:The array of menu item IDs; empty array if none;
Source code
function wp_get_associated_nav_menu_items( $object_id = 0, $object_type = 'post_type' ) {
$object_id = (int) $object_id;
$menu_item_ids = array();
$query = new WP_Query;
$menu_items = $query->query(
array(
'meta_key' => '_menu_item_object_id',
'meta_value' => $object_id,
'post_status' => 'any',
'post_type' => 'nav_menu_item',
'posts_per_page' => -1,
)
);
foreach( (array) $menu_items as $menu_item ) {
if ( isset( $menu_item->ID ) && is_nav_menu_item( $menu_item->ID ) ) {
if ( get_post_meta( $menu_item->ID, '_menu_item_type', true ) != $object_type )
continue;
$menu_item_ids[] = (int) $menu_item->ID;
}
}
return array_unique( $menu_item_ids );
}
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A HitchHackers guide through WordPress 
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