functions.php

<?php

//* Create Portfolio Type custom taxonomy
add_action( 'init', 'divi_type_taxonomy' );
function divi_type_taxonomy() {

	register_taxonomy( 'portfolio-type', 'portfolio',
		array(
			'labels' => array(
				'name'          => _x( 'Types', 'taxonomy general name', 'divi' ),
				'add_new_item'  => __( 'Add New Portfolio Type', 'divi' ),
				'new_item_name' => __( 'New Portfolio Type', 'divi' ),
			),
			'exclude_from_search' => true,
			'has_archive'         => true,
			'hierarchical'        => true,
			'rewrite'             => array( 'slug' => 'portfolio-type', 'with_front' => false ),
			'show_ui'             => true,
			'show_tagcloud'       => false,
		)
	);

}


//* Create portfolio custom post type
add_action( 'init', 'divi_portfolio_post_type' );
function divi_portfolio_post_type() {

	register_post_type( 'portfolio',
		array(
			'labels' => array(
				'name'          => __( 'Portfolio', 'divi' ),
				'singular_name' => __( 'Portfolio', 'divi' ),
			),
			'has_archive'  => true,
			'hierarchical' => true,
			'menu_icon'    => 'dashicons-portfolio',
			'public'       => true,
			'rewrite'      => array( 'slug' => 'portfolio', 'with_front' => false ),
			'supports'     => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'revisions', 'page-attributes' ),
			'taxonomies'   => array( 'portfolio-type' ),

		)
	);
	
}

//* Change the number of portfolio items to be displayed (props Brad Dalton)
add_action( 'pre_get_posts', 'divi_portfolio_items' );
function divi_portfolio_items( $query ) {

	if( $query->is_main_query() && !is_admin() && is_post_type_archive( 'portfolio' ) ) {
		$query->set( 'posts_per_page', '12' );
	}

}