Hello All, The following code below will help you to create Tab Bar in phoneGap Onesen UI.

<ons-tabbar>

  <ons-tabbar-item 
    icon="home"
    label="Home"
    page="FirstPage.html"
    active="true"></ons-tabbar-item> 

  <ons-tabbar-item 
    icon="comment"
    label="Comments"      
    page="secondPage.html"></ons-tabbar-item> 

  <ons-tabbar-item 
    icon="gear"
    label="Settings"
    page="thirdPAge.html"></ons-tabbar-item> 

</ons-tabbar>

The above code <ons-tabbar> define a set of the tab bars, Inside which we can define the tab Items.
Here <ons-tabbar-item> defines tab item.
icon="home" shows the nice home icon on tab button.
label="Home" show's the text below the icons.
active="true" show's by default selected tab.

icon="comment" show's the comment icon and icon="gear" shows a nice gear icon.