In the interests of DRY

[eluser]AndrewMalachel[/eluser]
I think, you should add at the end of every function (in this case function one to function three):

$this->_output($master_view['main_content']);

so at the end of each function, will call the _output function..

for ex.:

Code:

function one() {
//[..]
$master_view['main_content'] = 'content1';
$this->_output($master_view['main_content']);
}