Code: Select all
<p:selectManyMenu var="v1" showCheckbox="true">
<f:selectItems value="#{['one','two']}" />
<p:column><h:outputText value="#{v1}"/></p:column>
<p:column>
<p:selectManyMenu var="v2" showCheckbox="true">
<f:selectItems value="#{['three','four']}" />
<p:column><h:outputText value="#{v2}"/></p:column>
</p:selectManyMenu>
</p:column>
</p:selectManyMenu>