The foreach loop in header.php used $slug and $servicio as loop
variables, which overwrote the same-named variables set by
servicio.php. After the loop, both variables held the last service
(doble_nacionalidad), so every service page rendered that content.
Renamed loop variables to $_nav_slug and $_nav_srv to avoid collision.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>