如何绕过iframe的HTTP链接到HTTPS

Question

I have created one iframe in my domain, where i am calling an another website into that iframe.

So it's working fine till all the links are redirect as per http. But it is showing broken image page when it is redirecting to https server of their domain.

So can any one give me any advice what will be the best solution for this.

<?php 

header("access-control-allow-origin: *");
include "views/***/header.html"; 
?>

<section>
    <?php if($this->page_name=='content'){ ?>
    <div>
        <iframe  id='iframe2' src="http://content.******.com/?s=jd" frameborder="0" style="overflow: hidden; height: 900px; width: 100%;scrolling=no;"></iframe>
    </div>
  <?php }
   else if($this->page_name=='recruiter'){ ?>
    <div>
        <iframe id='iframe2' src="http://recruiter.*****.com/v2/ecom/index.html?s=jd" frameborder="0" style="overflow: hidden; height: 900px; width: 100%;scrolling=no;"></iframe>
    </div>
  <?php } ?>
</section>
<?php include "views/***/footer.html"; ?>

This code will not help that much because, all things are happening inside the iframe.