Customer Account

You need to go in the config under the tab display and edit your front end CSS.

There add the code below:

.hikashop_cpanel_title fieldset,#hikashop_order_listing fieldset, #hikashop_address_listing fieldset{ border: 0px; }


and remove the code:
#hikashop_order_listing fieldset, #hikashop_address_listing fieldset, #hikashop_affiliate_main fieldset {
border: 1px solid #CCC;
background-color: white;
}