i want to display category title where single product page

Hello there,

Thank you for your question.

Try to add the following code to your child theme functions.php to display categories menu on the product page

add_action( 'wp', 'basel_page_title_single_init', 18 );

function basel_page_title_single_init() {
	add_action( 'basel_after_header', 'basel_page_title_single', 11 );
}
function basel_page_title_single() {
    global $wp_query, $post;
    if( ! is_singular( 'product' ) ) return;

	$style = '';

	$page_for_posts    = get_option( 'page_for_posts' );
	$page_for_shop     = get_option( 'woocommerce_shop_page_id' );
	$page_for_projects = basel_tpl2id( 'portfolio.php' );

	$title_class = 'page-title-';

	$title_color = $title_type = $title_size = 'default';

	// Get default styles from Options Panel
	$title_design = basel_get_opt( 'page-title-design' );

	$title_size = basel_get_opt( 'page-title-size' );

	$title_color = basel_get_opt( 'page-title-color' );

	$title_class .= $title_type;
	$title_class .= ' title-size-'  . $title_size;
	$title_class .= ' color-scheme-' . $title_color;
	$title_class .= ' title-design-' . $title_design;

?>
	<div class="page-title <?php echo esc_attr( $title_class ); ?> title-shop" style="<?php echo esc_attr( $style ); ?>">
		<div class="container">
			<div class="nav-shop">
				<?php basel_product_categories_nav(); ?>

			</div>
		</div>
	</div>
<?php
}

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