add_filter( 'rwmb_meta_boxes', 'gnl_partner_post_box' );
function gnl_partner_post_box( $meta_boxes ) {
	global $sites, $clients_array, $cats_array;
    $prefix = 'gnl_post_attributes_';
		// 1st meta box
    $meta_boxes[] = array(
        'id'         => 'post_attributes_box',
        'title'      => __( 'Post Attributes', 'textdomain' ),
        'post_types' => array( 'post', 'gnl_events'),
        'context'    => 'side',
        'priority'   => 'high',
        'fields' => array(
						array(
							'id' => $prefix . 'alias',
							'type' => 'taxonomy',
							'name' => esc_html__( 'Author Alias/Contributor', 'metabox-online-generator' ),
							'desc' => esc_html__( 'Select Alias', 'metabox-online-generator' ),
							'taxonomy' => 'contributor',
							'field_type' => 'select_advanced',
							'multiple' => true,

						),
						array(
							'id' => $prefix . 'sections',
							'type' => 'taxonomy',
							'name' => esc_html__( 'Category', 'metabox-online-generator' ),
							'desc' => esc_html__( 'Select Category', 'metabox-online-generator' ),
							'taxonomy' => 'section',
							'field_type' => 'select_tree',
							//'admin_columns' => true,


						),
						array(
							'id' => $prefix . 'tags',
							'type' => 'taxonomy',
							'name' => esc_html__( 'Tags', 'metabox-online-generator' ),
							'desc' => esc_html__( 'Apply Tags', 'metabox-online-generator' ),
							'taxonomy' => 'tag',
							'field_type' => 'select_advanced',
							'multiple' => true,
						),
						array(
                'name'  => __( 'Partners:', 'textdomain' ),
                'desc'  => 'Add partners. List generated from the Intranet',
                'id'    => $prefix . 'partners',
                'type'  => 'select_advanced',
                'class' => 'client-box-class',
                'options'  => $clients_array,
                'multiple' => true,

            ),
						array(
							'id' => $prefix . 'cities',
							'type' => 'taxonomy',
							'name' => esc_html__( 'Cities', 'metabox-online-generator' ),
							'desc' => esc_html__( 'Select Cities', 'metabox-online-generator' ),
							'taxonomy' => 'city',
							'field_type' => 'checkbox_list',
							'multiple' => true,

						),

						array(
                'name'  => __( 'Locations/Venues:', 'textdomain' ),
                'desc'  => 'Add Locations associated to this post',
                'id'    => $prefix . 'locations',
								'type' => 'post',
                'class' => 'client-box-class',
								'post_type' => 'gnl_locations',
								'field_type' => 'select_advanced',
                'multiple' => true,

            ),
						array(
								'id' => $prefix . 'rating',
								'name' => esc_html__( 'Importance Rating:', 'textdomain' ),
								'type' => 'select',
								'placeholder' => esc_html__( 'Select Rating', 'textdomain' ),
								'options' => array(
									1 => '1 - High',
									'2 - Normal',
									'3 - Low',
								),
								'std' => '2',
						),
						array(
							'id' => $prefix . 'featured',
							'name' => esc_html__( 'Featured Post', 'textdomain' ),
							'type' => 'checkbox',
							'desc' => esc_html__( 'Yes, This is Featured', 'textdomain' ),
						),
        	),
			);

    return $meta_boxes;
}