quick code

help.php

global $basic_info;

// $posts is a list of posts for which you have meta data for

foreach ( $posts as $post )
{
	$meta = $basic_info->the_meta( $post->ID );

	if ( isset( $meta['basic_info'] ) )
	{
		foreach ( $meta['basic_info'] as $info )
		{
			array_push( $clients, $info['client'] );
		}
	}
}

var_dump( $clients );