Redefine administrative paths defined by other modules.
$paths: An associative array of administrative paths, as defined by implementations of hook_admin_paths().
function hook_admin_paths_alter(&$paths) {
// Treat all user pages as administrative.
$paths['user'] = TRUE;
$paths['user/*'] = TRUE;
// Treat the forum topic node form as a non-administrative page.
$paths['node/add/forum'] = FALSE;
}