Lightning navigation example

bar.cmp

<aura:component implements="c:view">
    <div>Using view 'bar': {!v.message}</div>
    <ui:button label="Navigate to bar" press="{!c.navTofoo}"/>
</aura:component>

barController.js

({
	navToFoo : function(component, event, helper) {
    $A.get("e.c:navigateToView").setParams({view: "foo"}).fire();
	}
})

foo.cmp

<aura:component implements="c:view">
    <div>Using view 'foo': {!v.message}</div>
    <ui:button label="Navigate to bar" press="{!c.navToBar}"/>
</aura:component>

fooController.js

({
	navToBar : function(component, event, helper) {
    $A.get("e.c:navigateToView").setParams({view: "bar"}).fire();
	}
})

navContainer.app

<aura:application access="GLOBAL">
    <aura:attribute name="message" type="String" default="Hello"/>
    <aura:handler event="c:navigateToView" action="{!c.navigateToView}"/>

    The message: <ui:inputText value="{!v.message}" updateOn="keyup"/>

    <div aura:id="content">
        <c:foo message="{!v.message}"/>
    </div> 

    <!-- Workaround for aura:dependency not being access="GLOBAL" to keep newCmpAsync() client side -->
    <aura:if isTrue="false"><c:bar/></aura:if>	
</aura:application>

navigateToView.evt

<aura:event type="APPLICATION" description="Navigate to the specified view">
	<aura:attribute name="view" type="String" required="true"/>
</aura:event>

view.intf

<aura:interface description="view interface">
	<aura:registerEvent name="navigateEvent" type="c:navigateToView"/>
  <aura:attribute name="message" type="String"/>
</aura:interface>

can you post the navcontainer controller code?