php remove only wrapper tag : How can remove with preg_replace only wrapper tag.
for example: I want remove <p> tag:
`$html = "<p><div><p>aaaaaa</p></div></p>";`
output should be `<div><p>aaaaaa</p></div>`
if input is `$html = "<p>aaaaaa</p><div>bbbb</div>";`
output should remind `<div><p>aaaaaa</p></div>`

