Filter the URL to the author's page
<?php add_filter( 'author_link', 'filter_function_name' ) ?>
Added to your child themes functions.php file, you can modify the author link for all posts or using conditional tags.
add_filter( 'author_link', 'modify_author_link', 10, 1 ); function modify_author_link( $link ) { $link = 'http://example.com/'; return $link; }
author_link is located in wp-includes/author-template.php
the_author(), get_the_author(), get_the_author_id(), the_author_link(), get_the_author_link(), the_author_meta(), get_the_author_meta(), the_author_posts(), get_the_author_posts(), the_author_posts_link(), get_author_posts_url(), get_the_modified_author(), the_modified_author(), wp_dropdown_users(), wp_list_authors()