小编Bar*_*rry的帖子

  $("document").ready(function() {
      $("#example p").replaceWith(replacementFn);
  });

  function replacementFn() {
      if ($(this).text().indexOf("1") != -1) {
          return "<p>This is paragraph uno</p>";
      }
      else {
          return this.outerHTML;
      }
  }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="example">
    <p class="a">This is paragraph 1</p>
    <p id="para1">This is paragraph 2</p>
    <p class="b">This is paragraph 3</p>
    <p id="para4" lang="en-us">This is paragraph 4</p>
    <p id="para5" lang="en-gb">This is paragraph 5</p>
</div>