如何在选项卡栏项中显示大标签栏名称

I created a tab bar controller with 3 tab bar items and the tab bar items names are very large and they are displaying names on one over the other. i want to display the name in short way. for example: tab bar item name is: ("Iphone Real Device") i want to display it as (Iphone...) Can any one help me in this issue please......I created a tab bar controller with 3 tab bar i