Cannot find where to edit

I have a blog, and at one time, I did go in to the code to change the link. (it is a google search).

Now, I’ve been through all the code pages and cannot find it!

the blog is at https://www.iv-7sales.com/blog. I want to change in the menu, Read News.

I find it of course when I do a page source.

Where is the code for this within wordpress editor? I checked ?

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Here is the section:
====================

[code moderated as per forum rules - please use the pastebin.
should you post a small amout of code directly, please mark it using backticks or the 'code' button.]

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In the page.php there is this section: BUT the search as I posted just above....includes More words (example athletes foot)
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<?php
$root_url='https://'.$_SERVER['HTTP_HOST'].'/IV_7/';
//$root_url='https://'.$_SERVER['HTTP_HOST'].'/IV7/';
   if(is_page('2'))
   {
header("location:https://news.google.com/news/search?aq=f&pz=1&cf=all&ned=us&hl=en&q=salmonella OR ecoli OR mrsa OR rotovirus OR novovirus OR H1N1 OR Staphylococcus");
   }
   elseif(is_page('22'))
   {
	  header("location:"www.iv-7sales.com");
   }
?>