<p:panelGrid columns="2" >

                    <p:outputLabel for="category" value="Категории: " />
                    <p:selectOneMenu id="category" value="#{searchFilterController.CATEGORY}" style="width:300px">
                        <p:ajax listener="#{searchFilterController.onCategoryChange()}"  update="autoMark, autoModel" />
                        <f:selectItem itemLabel="" itemValue="" noSelectionOption="true" />
                        <f:selectItems value="#{searchFilterController.CATEGORIES}" />
                    </p:selectOneMenu>

                    <p:outputLabel for="autoMark" value="Марка: " />
                    <p:selectOneMenu id="autoMark" value="#{searchFilterController.AUTO_MARK}" style="width:300px">
                        <p:ajax listener="#{searchFilterController.onAutoMarkChange()}"  update="autoModel" />
                        <f:selectItem itemLabel="" itemValue="" noSelectionOption="true" />
                        <f:selectItems value="#{searchFilterController.AUTO_MARKS}" />
                    </p:selectOneMenu>

                    <p:outputLabel for="autoModel" value="Модель: " />
                    <p:selectOneMenu id="autoModel" value="#{searchFilterController.AUTO_MODEL}" style="width:300px">
                        <f:selectItem itemLabel="" itemValue="" noSelectionOption="true" />
                        <f:selectItems value="#{searchFilterController.AUTO_MODELS}" />
                    </p:selectOneMenu>
              </p:panelGrid>

<p:panelGrid columns="2" >
                    <p:outputLabel for="transmission" value="Коробка передач" />
                    <p:selectOneMenu id="transmission" value="#{searchFilterController.TRANSMISSION}" style="width:300px">
                        <f:selectItem itemLabel="" itemValue="" noSelectionOption="true" />
                        <f:selectItems value="#{searchFilterController.TRANSMISSIONS}" />
                    </p:selectOneMenu>
</p:panelGrid>