PDF Catalog Data & HTML Filters for custom post data

Additional filters have been introduced with version 1.7.1. and up. These can be used to add additional HTML into the data. You need to return an HTML inside your add_filters option:

// Category HTML
apply_filters( 'woocommerce_pdf_catalog_category_html', $categoryTemplate->get_template($categoryLayout), $category_id);
// Product HTML
apply_filters('woocommerce_pdf_catalog_single_product_html', $html, $this->data->ID)
// All Product Data
apply_filters('woocommerce_pdf_catalog_product_data', $this->data);
// Product Information Filters - return $HTML
apply_filters('woocommerce_pdf_catalog_before_product_information', '', $this->data->ID);
apply_filters('woocommerce_pdf_catalog_before_product_information_start', '', $this->data->ID);
apply_filters('woocommerce_pdf_catalog_before_product_information_read_more', '', $this->data->ID);
apply_filters('woocommerce_pdf_catalog_before_product_information_categories', '', $this->data->ID);
apply_filters('woocommerce_pdf_catalog_before_product_information_end', '', $this->data->ID);
apply_filters('woocommerce_pdf_catalog_after_product_information', '', $this->data->ID);