В шаблоне Товар найдите и удалите:
{% IFNOT goods_features_empty %}<li><a href="javascript:tabSwitch(2);" id="tab_2">Характеристики</a></li>{% ENDIF %}
<!-- Характеристики -->
{% IFNOT goods_features_empty %}
<div id="content_2" class="tab-content" {% IF GOODS_DESCRIPTION_LARGE || GOODS_SEO_DESCRIPTION_SHORT || GOODS_SEO_DESCRIPTION_LARGE %}style="display:none;"{%ENDIF%}>
<table class="table-box">
<tbody>
{% FOR goods_features%}
<tr class="first odd">
<th class=""><span class="value">{goods_features.NAME}</span></th>
<td class="data last">{goods_features.VALUE}</td>
</tr>
{% ENDFOR %}
</tbody>
</table>
</div>
{% ENDIF %}
далее найдите:
<!-- Описание -->
<div id="content_1" class="tab-content">
{% IFNOT goods_features_empty %}
<div class="properties">
<h3>Характеристики</h3>
{% FOR goods_features %}
<div class="oneprop">
<div class="attr_name">{goods_features.NAME} :</div>
<div class="attr_value">{goods_features.VALUE}</div>
</div>
{% ENDFOR %}
</div>
{% ENDIF %}
замените на:
<!-- Описание -->
<div id="content_1" class="tab-content">
{% IFNOT goods_features_empty %}
<div class="properties">
<h3>Характеристики</h3>
<table class="table-box">
<tbody>
{% FOR goods_features%}
<tr class="first odd">
<th class=""><span class="value">{goods_features.NAME}</span></th>
<td class="data last">{goods_features.VALUE}</td>
</tr>
{% ENDFOR %}
</tbody>
</table>
</div>
{% ENDIF %}