JQuery :: Change The First Available Link Without Affecting The Others

I am having is when I click on a link that contains:

$('ul:first a').filter(function(i) { return $.trim($(this).text())== ''; }).text('OSIS')

It changes all the available links that contains text()==''. however I only want it to change the first available link.

Here is some of my code as an example:

$(document).ready(function() {
$('#osisbox').click(function() { $('ul:first a').filter(function(i) { return $.trim($(this).text())== ''; }).text('OSIS')

[Code].....