如何将href传递给链接？

let heading = document.querySelectorAll(".heading");
let map = new Map();
for (let i = 0; i < heading.length; ++i) {
  let a = heading[i].querySelectorAll("a");
  let groupName = a[0].textContent.trim();
  for (let j = 1; j < a.length; ++j) {
    let companyName = a[j].textContent.trim();
    let href = a[j].href;
    let companyGroups = map.get(companyName);
    if (companyGroups) companyGroups.push({
      groupName,
      href
    });
    else map.set(companyName, [{
      groupName,
      href
    }]);
  }
}

let compare = (new Intl.Collator("ru")).compare;
let ul = document.createElement("ul");
ul.className = "some-style";
let companies = Array.from(map.keys()).sort(compare);
for (let companyName of companies) {
  let li = document.createElement("li");
  let a = document.createElement("a");
  a.textContent = companyName;
  li.append(a);

  let li_ul = document.createElement("ul");
  let companyGroups = map.get(companyName).sort(compare);
  for (let group of companyGroups) {
    let li = document.createElement("li");
    let a = document.createElement("a");
    a.href = group.href;
    a.textContent = group.groupName;
    li.append(a);
    li_ul.append(li);
  }
  li.append(li_ul);
  ul.append(li);
}

document.querySelector('.input').append(ul);

.some-style {
  background-color: silver;
  border: 1px solid black;
}

.hide {
  display: none;
}

<div class="input">
  <div>
    <ul class="hide">
      <li class="heading"><a href="google.com/samsung">Телевизоры</a>
        <ul>
          <li><a href="google.com/samsung" href="google.com/samsung">Samsung</a></li>
          <li><a href="google.com/samsung" href="google.com/samsung">Lenovo</a></li>
        </ul>
      </li>
      <li class="heading"><a href="google.com/samsung">Планшеты</a>
        <ul>
          <li><a href="google.com/lenovo-03">Lenovo</a></li>
          <li><a href="google.com/samsung">Samsung</a></li>
          <li><a href="google.com/acer-43">Acer</a></li>
        </ul>
      </li>
      <li class="heading"><a>Ноутбуки</a>
        <ul>
          <li><a href="google.com/lenovo-83">Lenovo</a></li>
          <li><a href="google.com/samsung-323">Samsung</a></li>
          <li><a href="google.com/acer-021">Acer</a></li>
        </ul>
      </li>
    </ul>