Custom taxonomy relationship not save from front end

While i submit a custom post from front end.All data saved in db but relationship like category is not save.But from admin its works well.

function wds_handle_frontend_new_post_form_submission() {
	// If no form submission, bail
	if ( empty( $_POST ) || ! isset( $_POST['submit-cmb'], $_POST['object_id'] ) ) {
		return false;
	}
	// Get CMB2 metabox object
	$cmb = wds_frontend_cmb2_get();
	$post_data = array();
	// Get our shortcode attributes and set them as our initial post_data args
	if ( isset( $_POST['atts'] ) ) {
		foreach ( (array) $_POST['atts'] as $key => $value ) {
			$post_data[ $key ] = sanitize_text_field( $value );
		}
		unset( $_POST['atts'] );
	}
	// Check security nonce
	if ( ! isset( $_POST[ $cmb->nonce() ] ) || ! wp_verify_nonce( $_POST[ $cmb->nonce() ], $cmb->nonce() ) ) {
		return $cmb->prop( 'submission_error', new WP_Error( 'security_fail', __( 'Security check failed.' ) ) );
	}
	// Check title submitted
	if ( empty( $_POST['bee_listing_title'] ) ) {
		return $cmb->prop( 'submission_error', new WP_Error( 'post_data_missing', __( 'New post requires a title.' ) ) );
	}
	// And that the title is not the default title
	if ( $cmb->get_field( 'bee_listing_title' )->default() == $_POST['bee_listing_title'] ) {
		return $cmb->prop( 'submission_error', new WP_Error( 'post_data_missing', __( 'Please enter a new title.' ) ) );
	}

	/**
	 * Fetch sanitized values
	 */
	$sanitized_values = $cmb->get_sanitized_values( $_POST );
	// Set our post data arguments
	$post_data['post_title']   = $sanitized_values['bee_listing_title'];
	//unset( $sanitized_values['bee_listing_title'] );

	$post_data['listingcat']= $sanitized_values['bee_listing_category'];
	//$post_data['post_content'] = $sanitized_values['bee_listing_description'];
	//unset( $sanitized_values['bee_listing_description'] );
	// Create the new post
	$new_submission_id = wp_insert_post( $post_data, true );

	// If we hit a snag, update the user
	if ( is_wp_error( $new_submission_id ) ) {
		return $cmb->prop( 'submission_error', $new_submission_id );
	}
	/**
	 * Other than post_type and post_status, we want
	 * our uploaded attachment post to have the same post-data
	 */
	unset( $post_data['post_type'] );
	unset( $post_data['post_status'] );
	// Try to upload the featured image
	$img_id = wds_frontend_form_photo_upload( $new_submission_id, $post_data );
	// If our photo upload was successful, set the featured image
	if ( $img_id && ! is_wp_error( $img_id ) ) {
		set_post_thumbnail( $new_submission_id, $img_id );
	}
	// Loop through remaining (sanitized) data, and save to post-meta
	foreach ( $sanitized_values as $key => $value ) {
		if ( is_array( $value ) ) {
			$value = array_filter( $value );
			if( ! empty( $value ) ) {
				update_post_meta( $new_submission_id, $key, $value );
			}
		} else {
			update_post_meta( $new_submission_id, $key, $value );
		}
	}
	/*
	 * Redirect back to the form page with a query variable with the new post ID.
	 * This will help double-submissions with browser refreshes
	 */
	wp_redirect( esc_url_raw( add_query_arg( 'post_submitted', $new_submission_id ) ) );
	exit;
}
add_action( 'cmb2_after_init', 'wds_handle_frontend_new_post_form_submission' );

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