From the phone records documentation :
Opens the URL in a new InAppBrowser instance, current browser instance, or system browser.
var ref = window.open(url, target, options);
To answer your question, use:
window.open(your_url, '_system', opts);
Please note that the domain must be white.
Update 04/24/2014:
I think I misunderstood the question (thanks to @peteorpeter commentator) - do you want some way to click the link in InAppBrowser and open it in a system browser (e.g. Mobile Safari on iOS). This is possible, but it will require some forethought and cooperation between the application developer and the person responsible for the links on the page.
When you create an IAB instance, you get a link to it:
var ref = window.open('http://foo.com', '_blank', {...});
You can register several event listeners at this link:
ref.addEventListener('loadStart', function(event){ ... });
This particular event is fired every time the URL of the IAB changes (for example, a link is clicked, the server returns 302, etc.), and you can check the new URL.
To break into the system browser, you need some kind of flag defined in the url. You can do any number of things, but for this example, let's say the systemBrowser flag is in the URL:
..... HTML Foo = 1 &? SystemBrowser = true
You will look for this flag in the event handler, and when you find it, go to the system browser:
ref.addEventListener('loadStart', function(event){ if (event.url.indexOf('systemBrowser') > 0){ window.open(event.url, '_system', null); } });
Please note that this is not the best method for detecting a flag in the URL (maybe this could lead to false positives), and I'm sure that PhoneGap whitelisting rules will still apply.