WordPress Add Custom Post Type With Category

Add to favorites

// Custom Post 1
    register_post_type( 'courses',
        array(
            'labels' => array(
                'name' => __( 'Courses' ),
                'singular_name' => __( 'Course' )
            ),
        'public' => true,
        'has_archive' => true,
        'supports' => array('title', 'editor', 'thumbnail'),
        'show_ui' => true
        )
    );
 register_taxonomy('courses_categories', 'courses', ['label' => 'Courses Categories','hierarchical' => true]);

NB! (The hierarchical array item is Important)
,’hierarchical’ => true