Can't concatenate Javascript and Struts tag

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Javascript

Java

jQuery

struts

I'm trying to create invisible divs with jQuery which in title will be populated dinamically by an struts tag, but its giving me invalid indexed property error:

Invalid indexed property 'niveisRisco['+<%=ctr%>+']

Heres the code i'm using:

$(function(){
        var mapaAplicacaoJs = $('#MapaAplicacao area'); 
        var mapaPerfilJs = $('#MapaPerfil area');

       <logic:present name="carteiraSelecionada">
        <logic:iterate name="carteiraSelecionada" property="carteiraAtual.niveisRisco" id="foo" indexId="ctr">
            mapaAplicacaoJs.each(function() {  
                mapaAplicacaoJs.before('<div id="nivel_risco_dv" class="tabindex" title="<bean:write name="carteiraSelecionada" property="carteiraAtual.niveisRisco['+<%=ctr%>+'].getDescricao" />"></div>');
         </logic:iterate>
        </logic:present>        
        });

If i hardcode