The TreeView can navigate by using the below JavaScript,

window.open(url, "RightFrame");

The Url can be found by parsing the HTML of the page. If the control's outerHtml is the <tvns:treeview .... > etc, like you wrote above, then you can use a C# script to quickly find the item and return the url. You would pass the text of item you want to navigate too and pass in the outerHTML as the input.

	string item = "";
	string pattern = "BOFrame[^\"]*\" [^>]*>\\s*<div\\s*[^>]*>[^<]*</div>";

	Regex rgx = new Regex(pattern, RegexOptions.IgnoreCase);
	MatchCollection matches = rgx.Matches(input);

	foreach (Match match in matches) {
		if (match.Value.Contains(text)) {
			item = match.Value;
			break;
		}
	}
	
	if (item.Equals("")) {
		return "not found";
	} 
	else {
		return "\\" + item.Substring(0, item.IndexOf("\""));
	}