----> No conversion
Array
(
    [0] => <a href="test.jpg" class="ABC" ><img title="mytitle" src="/sites/default/files/images/test01.jpg" /> </a> my recent photo.
    [1] => 
    [2] => test.jpg
    [3] =>  class="ABC" 
    [4] => title="mytitle" 
    [5] => /sites/default/files/images/test01.jpg
    [6] =>  /
    [7] =>  my recent photo.
)
---IN---
This is <a href="test.jpg" class="ABC" ><img title="mytitle" src="/sites/default/files/images/test01.jpg" /> </a> my recent photo.

---OUT---
This is <a href="test.jpg" class="ABC" ><img title="mytitle" src="/sites/default/files/images/test01.jpg" /> </a> my recent photo.
=====HIT!====
Array
(
    [0] => This is <div><img title="mytitle" src="/sites/default/files/images/test01.jpg" alt="xxx" />
    [1] => title="mytitle" 
    [2] => /sites/default/files/images/test01.jpg
    [3] =>  alt="xxx" /
)
---IN---
This is <div><img title="mytitle" src="/sites/default/files/images/test01.jpg" alt="xxx" /> </div> my recent photo.

---OUT---