function get_block_categories( $post ) {
	$default_categories = array(
		array(
			'slug'  => 'common',
			'title' => __( 'Common Blocks' ),
			'icon'  => null,
		),
		array(
			'slug'  => 'formatting',
			'title' => __( 'Formatting' ),
			'icon'  => null,
		),
		array(
			'slug'  => 'layout',
			'title' => __( 'Layout Elements' ),
			'icon'  => null,
		),
		array(
			'slug'  => 'widgets',
			'title' => __( 'Widgets' ),
			'icon'  => null,
		),
		array(
			'slug'  => 'embed',
			'title' => __( 'Embeds' ),
			'icon'  => null,
		),
		array(
			'slug'  => 'reusable',
			'title' => __( 'Reusable Blocks' ),
			'icon'  => null,
		),
	);

	/**
	 * Filter the default array of block categories.
	 *
	 * @since 5.0.0
	 *
	 * @param array   $default_categories Array of block categories.
	 * @param WP_Post $post               Post being loaded.
	 */
	return apply_filters( 'block_categories', $default_categories, $post );
}