mvc_public_url

This returns a URL the corresponds to the routing options that are passed to it. For example:

<?php
// http://mysite.com/venues/
echo mvc_public_url(array('controller' => 'venues'));

// http://mysite.com/venues/1
echo mvc_public_url(array('controller' => 'venues', 'id' => 1));

// http://mysite.com/venues/my_action/1
echo mvc_public_url(array('controller' => 'venues', 'action' => 'my_action', 'id' => 1));

?>

Ideally, for 'show' actions, you would pass an object, as this allows Pretty URLs to be used if to_url() is defined in the model:

<?php
// http://mysite.com/documentation/5/creating-database-tables/
$documentation_node_model = new DocumentationNode();
$documentation_node = $documentation_node_model->find_by_id(5);
echo mvc_public_url(array('object' => $documentation_node));
?>

Note: If you are looking to make a link to a MVC page from within an MVC page, you may want to use the HTML helper's link() method:

<?php
$this->html->link('All Venues', array('controller' => 'venues'))
?>