Use .append instead of .html
var response = "[{
"rank":"9",
"content":"Alon",
"UID":"5"
},
{
"rank":"6",
"content":"Tala",
"UID":"6"
}]";
// convert string to JSON
response = $.parseJSON(response);
$(function() {
$.each(response, function(i, item) {
var $tr = $('<tr>').append(
$('<td>').text(item.rank),
$('<td>').text(item.content),
$('<td>').text(item.UID)
); //.appendTo('#records_table');
console.log($tr.wrap('<p>').html());
});
});