When I try to echo data from database using php my html page breaked

I want to make a dynamic page but when I try to echo fetched data in HTML using echo between HTML tags the page structure breaks:

This image is with php code :

This is image without php code :

<div >
<div >

  <?php while($data = mysqli_fetch_assoc($result)): ?>

  <h1 >
    <?php 
      $about = $data['content'];
      $about_intro = explode("India",$about);
      echo $about_intro[0];
    ?>
  </h1>
 <!--  <input  type="submit" value="Tell Me More"> -->
</div>
</div>

<?php endwhile; ?>
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