Add new markup for navigation

functions.php

add_action( 'wp', 'remove_astra_woocommerce_action', 11 );
function remove_astra_woocommerce_action(){
	if( is_callable( 'ASTRA_Ext_WooCommerce_Markup::get_instance' ) ) {
		remove_action( 'woocommerce_single_product_summary', array( ASTRA_Ext_WooCommerce_Markup::get_instance(), 'product_navigation_wrapper_start' ), 1, 0 );
		remove_action( 'woocommerce_single_product_summary', array( ASTRA_Ext_WooCommerce_Markup::get_instance(), 'next_previous_links' ), 1, 0 );
		remove_action( 'woocommerce_single_product_summary', array( ASTRA_Ext_WooCommerce_Markup::get_instance(), 'product_navigation_wrapper_end' ), 1, 0 );
	}
}

add_action( 'wp', 'add_new_navigation_markup' );
function add_new_navigation_markup() {
	add_action( 'woocommerce_single_product_summary', 'add_product_navigation_wrapper_start', 1, 0 );
	add_action( 'woocommerce_single_product_summary', 'add_woocommerce_product_summary', 1, 0 );
	add_action( 'woocommerce_single_product_summary', 'add_product_navigation_wrapper_end', 1, 0 );
}

/**
 * Breadcrumb wrapper Start
 */
function add_product_navigation_wrapper_start() {
	$nav_style = astra_get_option( 'single-product-nav-style' );
	?>
	<div class="ast-product-navigation-wrapper <?php echo esc_attr( $nav_style ); ?>">
	<?php
}

function add_woocommerce_product_summary() {
	if ( ! is_product() ) {
		return;
	}
	?>
	<div class="product-links">
		<?php
		previous_post_link( '%link', '<i class="ast-icon-previous"></i>', true, '', 'product_cat' );
		next_post_link( '%link', '<i class="ast-icon-next"></i>', true, '', 'product_cat' );
		?>
	</div>
	<?php
}


/**
 * Breadcrumb wrapper End
 */
function add_product_navigation_wrapper_end() {
	?>
	</div><!-- .ast-product-navigation-wrapper -->
	<?php
}