You can try "indexId" param in the logic:iterate

It will give us the index value. So, inside the loop, you
can check if index value is multiple of 5 then only show the
record from the bean.

ya.. this will surely work fine

<logic:iterate id="item" name="listName"  scope="request" 
indexId="index">
<%
    if( (index%5)==0 ){
       <bean:write name="item"/>
     }
%>
</logic:iterate>