<li class="ms2_product">
 	<form method="post" class="ms2_form  msoptionsprice-product">
<input type="hidden" name="id" value="[[+id]]">
<input type="hidden" name="key" class="key-product" value="">
<input type="hidden" name="options" value="[]">
            .......
              {'!msOptionsPrice.option' | snippet : [
                   'product'=>$id,
                   'options'=>'wes',
                   'tpl'=>'tpl.options-weight'
                ]}
......
      <button  type="submit" class="btn btn-add-cart addcart" title="Купить {$pagetitle}"  name="ms2_action" value="cart/add"><i class="fa fa-shopping-cart"></i></button>

  	</form>      
    </li>

{foreach $options as $name => $values}
        {foreach $values as $value index=$index}
         <div class="form_radio_btn col-xs-4 col-sm-4 col-md-4 mt20">
            <input type="radio" value="{$values[$index]}" id="wes_{$index}" name="options[{$name}]"  
                {if $index == 0}checked="checked"{/if}
                />
            <label  for="wes_{$index}"  class=" {if $index == 0}checked{/if}"> {$values[$index]}  [[%ms2_frontend_weight_unit]]</label>
          </div>
        {/foreach}
{/foreach}

<?php
$cost = $msOrder->get('cost');
$new_cost = $cost - $cost * 0.15;
$msOrder->set('cost', $new_cost);
$msOrder->save();

$(document).on('pdopage_load', function( ) {
    lazyLoadInstance.update();
});
$(document).on('mse2_load', function () {
    lazyLoadInstance.update();
});