[Asiqur Rahman]

Hope this helps. put these codes into your theme functions.php file.

add_filter( 'bbp_get_reply_author_url', 'lp_member_profile_links' );
add_filter( 'bbp_get_topic_author_url', 'lp_member_profile_links' );
add_filter( 'bbp_get_author_url', 'lp_member_profile_links' );
function lp_member_profile_links( $url ) {
	if ( ! empty( $url ) ) {
		return $url . 'profile';
	}
	
	return $url;
}