autocomplete_taxonomies.php

<?php
add_filter( 'vc_autocomplete_[shortcode_base]_[param_name]_callback', 'vc_autocomplete_taxonomies_field_search', 10, 1 );
add_filter( 'vc_autocomplete_[shortcode_base]_[param_name]_render', 'vc_autocomplete_taxonomies_field_render', 10, 1 );

$args = array(
	'name'     => 'Shortcode Name',
	'base'     => 'shortcode_base',
	'category' => __( 'Themes Elements', 'vtm' ),
	'params'   => array(
		array(
			'type' => 'autocomplete',
			'heading' => 'Chọn danh mục',
			'param_name' => 'param_name',
			'settings' => array(
				'multiple' => true,
				'min_length' => 1,
				'groups' => true,
				// In UI show results grouped by groups, default false
				'unique_values' => true,
				// In UI show results except selected. NB! You should manually check values in backend, default false
				'display_inline' => true,
				// In UI show results inline view, default false (each value in own line)
				'delay' => 500,
				// delay for search. default 500
				'auto_focus' => true,
				// auto focus input, default true
			),
			'description' => __( 'Enter categories, tags or custom taxonomies.', 'js_composer' )
		)
	),
)

vc_autocomplelte_custom_post_type.php

<?php
/* AUTOCOMPLETE SEARCH */
add_filter( 'vc_autocomplete_dalat_diadiem_uudai_hotels_callback', 'nka_vc_include_cpt_hotel_search', 10, 1 );

/* AUTOCOMPLETE RENDER VALUE */
add_filter( 'vc_autocomplete_dalat_diadiem_uudai_hotels_render', 'nka_vc_include_field_render', 10, 1 );

function nka_vc_include_cpt_hotel_search( $search_string ) {
	return nka_vc_include_field_search( $search_string, 'dl_hotel' );
}

function nka_vc_include_field_render( $value ) {
    $post = get_post( $value['value'] );
    return is_null( $post ) ? false : array(
        'label' => $post->post_title,
        'value' => $post->ID
    );
}

function nka_vc_include_field_search( $search_string, $post_type ) {
    $query = $search_string;
    $data = array();
    $args = array(
        's' => $query,
        'post_type' => $post_type,
    );
    $args['vc_search_by_title_only'] = true;
    $args['numberposts'] = - 1;
    if ( 0 === strlen( $args['s'] ) ) {
        unset( $args['s'] );
    }
    add_filter( 'posts_search', 'vc_search_by_title_only', 500, 2 );
    $posts = get_posts( $args );
    if ( is_array( $posts ) && ! empty( $posts ) ) {
        foreach ( $posts as $post ) {
            $data[] = array(
                'label' => $post->post_title,
        		'value' => $post->ID
            );
        }
    }

    return $data;
}

/* NEW PARAM */
vc_add_shortcode_param( 'dl_post_cat', 'vc_param_dl_post_cat_callback' );
function vc_param_dl_post_cat_callback( $settings, $value ) {
	$_terms = get_terms( array(
		'taxonomy' => 'category',
		'hide_empty' => false
	) );

	$multiple = isset($settings['multiple']) ? 'multiple="multiple"' : '';

   ob_start(); ?>
   <select <?php echo $multiple ?> name="<?php echo esc_attr( $settings['param_name'] ) ?>"
   		class="wpb_vc_param_value wpb-input wpb-select <?php echo esc_attr( $settings['param_name'] ) ?>_field <?php echo esc_attr( $settings['param_name'] ) ?>">
   		<option value="0">Chọn danh mục</option>
   		<?php foreach ($_terms as $item) { ?>
   			<option <?php selected( $value, $item->term_id ) ?> value="<?php echo $item->term_id ?>"><?php echo $item->name ?></option>
   		<?php } ?>
   </select>
   <?php $render = ob_get_clean();
   return $render;
}

woo_product_cat_param_type.php

<?php
/*
  New Param Type : create dropdown for product_cat taxonomy in WooCommerce
*/
vc_add_shortcode_param( 'woo_product_cat', 'vc_param_woo_product_cat_callback' );
function vc_param_woo_product_cat_callback( $settings, $value ) {
	$_terms = get_terms( array(
		'taxonomy' => 'product_cat',
		'hide_empty' => false
	) );

   ob_start(); ?>
   <select name="<?php echo esc_attr( $settings['param_name'] ) ?>"
   		class="wpb_vc_param_value wpb-input wpb-select <?php echo esc_attr( $settings['param_name'] ) ?>_field <?php echo esc_attr( $settings['param_name'] ) ?>">
   		<option value="0">Chọn danh mục</option>
   		<?php foreach ($_terms as $item) { ?>
   			<option <?php selected( $value, $item->term_id ) ?> value="<?php echo $item->term_id ?>"><?php echo $item->name ?></option>
   		<?php } ?>
   </select>
   <?php $render = ob_get_clean();
   return $render;
}