leteMethod="#{categoryController.completeCategory}" 
                                var="category"
                                class="w-100"
                                forceSelection="true"
                                inputStyleClass="w-100"
                                itemLabel="#{category.name}"
                                itemValue="#{category}">
                                <p:ajax event="itemSelect" process="acCat" update="gpItem" ></p:ajax>
                            </p:auto