Twenty Links - Redirect single posts

gistfile1.aw

<?php
// in functions.php

// Find URL in post
function be_find_url( $content ) {
	preg_match( '|href=["]([^\'^"]+)["]|mi', $content, $m ); 
	return $m[1];
}

// Redirect single posts to linked URL
function be_redirect_on_single() {
	if( is_single() ) {
		global $post;
		$url = be_find_url( $post->post_content );
		if( empty( $url ) ) return;
		wp_redirect( $url, '301' );
		exit;
	}
}
add_action( 'template_redirect', 'be_redirect_on_single' );