您要选择特定的URL吗？

null

a[href='https://specificWeb.com/']{
 background: red;
 }

<a href="www.link.com">CATEGORY NAME</a>
                                                                                                                                                                                        <div class="123">
    <div class="categories ">
      <span>Categories:</span>
      <ul>
      <li>
      <a href="https://someweb.com/"> 1 </a>
      </li>

      <li>
      <a href="https://specificWeb.com/"> 2 this is what i need to select </a>
      </li>
      
      </ul>
    </div>
  </div>

尝试:

li a[href='https://someweb.com/']:eq(1)

null

$("li a[href='https://someweb.com/']:eq(1)").css("background","red");

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <li>
  <a href="https://someweb.com/"> 1 </a>
  </li>
  <li>
  <a href="https://someweb.com/"> 2 this is what i need to select </a>
  </li>
  <li>
  <a href="https://someweb.com/"> 3 </a>
  </li>