function project_register_post_type() {
register_post_type(
'project',
array (
'labels' => array(
'name' => __('Trainers'),
'singular_name' => __('Trainer')
),
'public' => true,
'has_archive' => true,
'rewrite' => array( 'slug' => 'protagonisti')
)
);
}
add_action('wp_loaded', 'project_register_post_type');