cmb2-select-2-terms-example.php

<?php
// Example meta box field
$featured_categories->add_field( array(
	'name'    => __( 'Featured categories', 'iweb' ),
	'id'      => 'featured_categories',
	'type'    => 'pw_multiselect',
	'options' => iweb_get_cmb_options_array_tax( 'category' ),
) );

/**
 * Get a list of terms
 *
 * Generic function to return an array of taxonomy terms formatted for CMB2.
 * Simply pass in your get_terms arguments and get back a beautifully formatted
 * CMB2 options array.
 *
 * @param string|array $taxonomies Taxonomy name or list of Taxonomy names
 * @param  array|string $query_args Optional. Array or string of arguments to get terms
 * @return array CMB2 options array
 */
function iweb_get_cmb_options_array_tax( $taxonomies, $query_args = '' ) {
	$defaults = array(
		'hide_empty' => false
	);

	$args = wp_parse_args( $query_args, $defaults );

	$terms = get_terms( $taxonomies, $args );

	$terms_array = array();

	if ( ! empty( $terms ) ) {
		foreach ( $terms as $term ) {
			$terms_array[$term->term_id] = $term->name;
		}
	}

	return $terms_array;
}