Well, the simple way of putting this is to automatically expand the left nav category list by commenting out the following lines on the rev.categories.xml.config under {root}/skins/Skin_#
Code:
<xsl:if test="count(child::Entity)>0 and (EntityID = $CategoryID or descendant::Entity/EntityID = $CategoryID) and count(child::Product)>0"> and its ending delimiter </xsl:if>
and then changing the Unicode character from the :
Code:
<span class="catMark">>></span>*
by changing the value of the highlighted item to whatever character you want, for example:
Code:
<span class="catMark">& # 6 7 8</span> (white spaces was used to avoid unicode translation)*