woocommerce_taxonomy_args_product_cat │ хук-фильтр │ WC 1.0

Использование

add_filter( 'woocommerce_taxonomy_args_product_cat', 'wp_kama_woocommerce_taxonomy_args_product_cat_filter' );

/**
 * Function for `woocommerce_taxonomy_args_product_cat` filter-hook.
 * 
 * @param  $array 
 *
 * @return 
 */
function wp_kama_woocommerce_taxonomy_args_product_cat_filter( $array ){

	// filter...
	return $array;
}
$array
-

Где вызывается хук

WC_Post_Types::register_taxonomies()
woocommerce_taxonomy_args_product_cat
woocommerce/includes/class-wc-post-types.php 90-127 
apply_filters(
	'woocommerce_taxonomy_args_product_cat',
	array(
		'hierarchical'          => true,
		'update_count_callback' => '_wc_term_recount',
		'label'                 => __( 'Categories', 'woocommerce' ),
		'labels'                => array(
			'name'                  => __( 'Product categories', 'woocommerce' ),
			'singular_name'         => __( 'Category', 'woocommerce' ),
			'menu_name'             => _x( 'Categories', 'Admin menu name', 'woocommerce' ),
			'search_items'          => __( 'Search categories', 'woocommerce' ),
			'all_items'             => __( 'All categories', 'woocommerce' ),
			'parent_item'           => __( 'Parent category', 'woocommerce' ),
			'parent_item_colon'     => __( 'Parent category:', 'woocommerce' ),
			'edit_item'             => __( 'Edit category', 'woocommerce' ),
			'update_item'           => __( 'Update category', 'woocommerce' ),
			'add_new_item'          => __( 'Add new category', 'woocommerce' ),
			'new_item_name'         => __( 'New category name', 'woocommerce' ),
			'not_found'             => __( 'No categories found', 'woocommerce' ),
			'item_link'             => __( 'Product Category Link', 'woocommerce' ),
			'item_link_description' => __( 'A link to a product category.', 'woocommerce' ),
		),
		'show_in_rest'          => true,
		'show_ui'               => true,
		'query_var'             => true,
		'capabilities'          => array(
			'manage_terms' => 'manage_product_terms',
			'edit_terms'   => 'edit_product_terms',
			'delete_terms' => 'delete_product_terms',
			'assign_terms' => 'assign_product_terms',
		),
		'rewrite'               => array(
			'slug'         => $permalinks['category_rewrite_slug'],
			'with_front'   => false,
			'hierarchical' => true,
		),
	)
)

Где используется хук в WooCommerce

woocommerce/src/Admin/Features/AsyncProductEditorCategoryField/Init.php 27 
add_filter( 'woocommerce_taxonomy_args_product_cat', array( $this, 'add_metabox_args' ) );