[eluser]Phil Sturgeon[/eluser]
The method you have posted above would not work, as it would simply send a string containing 'myLib_1' as an argument to your library's constructor, then line 2 would produce an error as $this->myLib_1 does not exist.
One way that will work is the hybrid of CI and native PHP methods.
Code:
$this->load->library('myLib');
$this->myLib->some_method();
$myLib_2 = new myLib()
$myLib_2->some_method();