split wordpress content into two columns at the more tag

gistfile1.php

$morestring = '<!--more-->';
$explode_content = explode( $morestring, $post->post_content );
$content_before = apply_filters( 'the_content', $explode_content[0] );
$content_after = apply_filters( 'the_content', $explode_content[1] );