Get all URLs from W3Schools sidebar menu (and formatted into the XML style required for Import Bookmarks in Chrome's Bookmark Manager!). Copies XML to clipboard ready for pasting into text editor viewing exported Chrome bookmarks.

bookmarks.html

<!DOCTYPE NETSCAPE-Bookmark-file-1>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
<TITLE>Bookmarks</TITLE>
<H1>Bookmarks</H1>
<DL><p>
    <DT><H3 ADD_DATE="1527292565" LAST_MODIFIED="1527802552" PERSONAL_TOOLBAR_FOLDER="true"></H3>
    <DL><p>
      <!-- PASTE CLIPBOARD HERE! -->
    </DL><p>
</DL><p>

format-w3schools-menu-links-for-chrome-import.js

function copyTextToClipboard(text) {
  var textArea = document.createElement("textarea");

  textArea.style.position = 'fixed';
  textArea.style.top = 0;
  textArea.style.left = 0;
  textArea.style.width = '2em';
  textArea.style.height = '2em';
  textArea.style.padding = 0;
  textArea.style.border = 'none';
  textArea.style.outline = 'none';
  textArea.style.boxShadow = 'none';
  textArea.style.background = 'transparent';
  textArea.value = text;
  document.body.appendChild(textArea);
  textArea.select();
  try {
    var successful = document.execCommand('copy');
    var msg = successful ? 'successful' : 'unsuccessful';
    console.log('Copying text command was ' + msg);
  } catch (err) {
    console.log('Oops, unable to copy');
  }
  document.body.removeChild(textArea);
}

var output = ''; 
$("#leftmenuinnerinner > a").each(
	function(){
		var h = this.href; var n = this.text; if (h != "undefined" && h.indexOf('http') > -1) {
			output += '\n<DT><A HREF="' + h + ' ADD_DATE="1527031674">' + n + '</A> '
		}; 
	}); 
  /* Select the text field */
  copyTextToClipboard(output);
alert("copied!");

Thank you to Emil Devantie Brockdorff's codepen for the copyTextToClipboard function. Nice work!