Use code from another website ?!

[eluser]ven_dev[/eluser]
Hello everyone!
I`m pretty new in CI
Its a simple question to you.
How can I(or what helper/class) should use to:
get a code from another website`s source code.
For example,I want to take this "<span class=gbts>Документи</span>" from www.google.bg
and use it in my function.

Regards!