#30: nav_menu_meta_box_object

nav_menu_meta_box_object.php

<?php
/**
 * Rename category and tag menus accordion sections.
 *
 * @see wp_ajax_menu_get_metabox()
 *
 * @param object $item_object The menu meta box object, e.g. post, page, category, post_tag.
 *
 * @return object The filtered meta box object.
 */
function wpdocs_modify_categories_menu_box( $item_object ) {
	// 'Categories' becomes 'Category Archives'
	if ( 'category' == $item_object->name )
		$item_object->labels->name = __( 'Category Archives', 'yourtextdomain' );

	// 'Tags' becomes 'Tag Archives'
	if ( 'post_tag' == $item_object->name )
		$item_object->labels->name = __( 'Tag Archives', 'yourtextdomain' );

	return $item_object;
}
add_filter( 'nav_menu_meta_box_object', 'wpdocs_modify_categories_menu_box' );