add_action('init', 'bbloomer_hide_price_add_cart_not_logged_in');
 
function bbloomer_hide_price_add_cart_not_logged_in() { 
if ( !is_user_logged_in() ) {       
 remove_action( 'woocommerce_after_shop_loop_item', 'woocommerce_template_loop_add_to_cart', 10 );
 remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_add_to_cart', 30 );
 remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_price', 10 );
 remove_action( 'woocommerce_after_shop_loop_item_title', 'woocommerce_template_loop_price', 10 );  
 add_action( 'woocommerce_single_product_summary', 'bbloomer_print_login_to_see', 31 );
 add_action( 'woocommerce_after_shop_loop_item', 'bbloomer_print_login_to_see', 11 );
}
}
 
function bbloomer_print_login_to_see() {
echo '<a class="button" href="' . get_permalink(wc_get_page_id('myaccount')) . '">' . __('Preise nur für Kunden sichtbar.<br>Bitte anmelden.', 'theme_name') . '</a>';
}