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changing an element in the dom

I have a page where I want to change the text in the blue box from NONE to something else. I am using grocery crud and codeigniter simplicity. 

$output = $crud->render();
$dom=new DOMDocument();
$dom->validateOnParse = true;

My plan was to search through the HTML of the DOM and then modify the text of the HTML before output. But it seems that when I search ById, the $Output doesn't have the "Active Campaign:NONE" prepended to it yet.I guess it gets add somewhere in _configure_output. But I don't want to modify the core code. 

Is there a better way to do this? 

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