Ändern von Icons im Navi Menü

<tal:master define="level options/level|python:0;
                    children options/children | nothing;
                    bottomLevel options/bottomLevel | nothing;
                    normalizeString nocall:context/plone_utils/normalizeString;
                    viewActions here/portal_properties/site_properties/typesUseViewActionInListings|python:();
                    member context/portal_membership/getAuthenticatedMember|nothing;
                    member_id member/getId|nothing;">


<metal:main define-macro="nav_main">
<tal:navitem repeat="node children">
<tal:checkSpacer define="thisIsSpacer python: test(node['Title'] == 'Zwischenraum', 'sidemenuSpacer', '');
                         showSpacer   python: test(thisIsSpacer and node['review_state'] == 'published', True, False);">
  <li class="sideNavItemSpacer"
      tal:condition="showSpacer">
    <div>

    </div>

  <li class="navTreeItem visualNoMarker"
      tal:define="children   node/children;
                  item       node/item;
                  useView    python:item.portal_type in viewActions;
                  itemUrl    python:test(useView, item.getURL() + '/view', item.getURL());
                  linkRemote python:item.getRemoteUrl and item.Creator != member_id;
                  isCurrent  node/currentItem;"
      tal:condition="python: (bottomLevel &lt;= 0 or level &lt; bottomLevel-1) and not thisIsSpacer">
 
      <tal:level define="item_type_class     python: 'visualIcon contenttype-' + normalizeString(item.portal_type);
                         item_wf_state_class python: 'state-' + normalizeString(item.review_state);">
 
      <div tal:attributes="class item_type_class"
           tal:define="itemClass string:$item_wf_state_class visualIconPadding;
                       itemClass python:test(isCurrent, itemClass + ' navTreeCurrentItem', itemClass);
                       spacing python:' ';
                       contente string: ${spacing} » ${item/Title};
                       contenten item/Title">

          <a tal:condition="python: level!=1"
             tal:attributes="href python:test(linkRemote, item.getRemoteUrl, itemUrl);
                             title item/Description;
                             class string:$itemClass"
              tal:content="contente">
              Selected Item Title
          </a>


          <div tal:condition="python: level==1">     
          <div tal:omit-tag="nocall:children" tal:attributes="id string:childerenen">   
          <a 
             tal:attributes="href python:test(linkRemote, item.getRemoteUrl, itemUrl);
                             title item/Description;
                             class string:$itemClass;"
              tal:content="contenten">

              Selected Item Title
          </a>
          </div>
          </div>         
      </div>
 
      <ul tal:attributes="class python:'navTree navTreeLevel'+str(level)"
          tal:define="level python:level+1;"
          tal:condition="nocall:children">
          <metal:recurse use-macro="here/portlet_navtree_macro/macros/nav_main"/>
      [/list]
      </tal:level>

</tal:checkSpacer>
</tal:navitem>
</metal:main>
</tal:master>

<div tal:attributes="class item_type_class"
           tal:define="itemClass string:$item_wf_state_class visualIconPadding;
                       itemClass python:test(isCurrent, itemClass + ' navTreeCurrentItem', itemClass);
                       spacing python:' ';
                       contente string: ${spacing} ${item/Title};
                       contenten item/Title">

         [b]<img tal:attributes="src string:${portal/url}">[/b]<a tal:condition="python: level!=1"
             tal:attributes="href python:test(linkRemote, item.getRemoteUrl, itemUrl);
                             title item/Description;
                             class string:$itemClass"
              tal:content="contente">
              Selected Item Title
          </a>


          <div tal:condition="python: level==1">     
          <div tal:omit-tag="nocall:children" tal:attributes="id string:childerenen">   
          <a
             tal:attributes="href python:test(linkRemote, item.getRemoteUrl, itemUrl);
                             title item/Description;
                             class string:$itemClass;"
              tal:content="contenten">

              Selected Item Title
          </a>
          </div>
          </div>         
      </div>