display custom post type on category pages

add_filter( 'jnews_get_content_attr', 'change_post_type', 99, 3 );


function change_post_type( $attr, $prefix, $id ) {

	if ( 'jnews_category_' === $prefix ) {

		$originals_cat_id = array( '_49', '_50' ); /* add your originals post category ids list with _ prefix  */

		if ( in_array( $id, $originals_cat_id ) ) {
			$attr['post_type'] = array( 'originals', 'posts' ); /* use this code if you want to display posts & originals  post type */

			$attr['post_type'] = 'originals'; /* use this code if you only want to display originals  post type */
		}
	}

	return $attr;
}