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filter is not described

wp_setup_nav_menu_item filter-hook . WP 1.0

This filter is documented in wp-includes/nav-menu.php

Usage

add_filter( 'wp_setup_nav_menu_item', 'filter_function_name_5958' );
function filter_function_name_5958( $post ){
	// filter...

	return $post;
}
$post
-

Where the hook is called

WP_Customize_Nav_Menu_Item_Setting::value_as_wp_post_nav_menu_item()
wp_setup_nav_menu_item
wp_setup_nav_menu_item()
wp_setup_nav_menu_item
wp-includes/customize/class-wp-customize-nav-menu-item-setting.php 644
$post = apply_filters( 'wp_setup_nav_menu_item', $post );
wp-includes/nav-menu.php 992
return apply_filters( 'wp_setup_nav_menu_item', $menu_item );

Where in WP core the hook is used WordPress

Usage not found.