How do I traverse this multidimensional JSON array/obj

I'm creating an AJAX script with PHP, and JS.

The PHP takes GET parameters, returns some data from the database. I need this data to be usable through javascript. My php verison < 5.2 so I dont have JSON encode. So far i've been able to get PHP to format a JSON array, the data looks like the following

{"6":{"lat":"34.409425","lng":"-119.861470"},"5":{"lat":"34.409414","lng":"-119.861221"},"8":{"lat":"34.410934","lng":"-119.861718"},"10":{"lat":"34.410503","lng":"-119.863998"},"9":{"lat":"34.412089","lng":"-119.866134"},"3":{"lat":"34.409475","lng":"-119.854704"},"7":{"lat":"34.413153","lng":"-119.855430"},"15":{"lat":"34.414979","lng":"-119.712181"},"14":{"lat":"34.414979","lng":"-119.712181"},"11":{"lat":"34.414979","lng":"-119.712181"},"13":{"lat":"34.414979","lng":"-119.712181"}}

The first key is a uuid then the following key is another array with latitude and logitude.  I need to extract this information from javascript.

function get_map()
{
	var distance = $("#distance").val();
	var sort = $("input[name='sort']:checked").val(); 
	var who = $("input[name='who']:checked").val();
	
	$.getJSON("ajax/ajax_get_locations_map.php",{distance: ""+distance+"",who: ""+who+"",sort: ""+sort+""}, function(data){
		var obj = (data);
		$.each(obj, function(i, val) {
 
		     //need help at this point to get variables  
		    });
	});
}

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