function find_words($content) {	
	$result = mysql_query("SELECT word from dictionary")or die(mysql_error());
	$words=array();

	while($row=mysql_fetch_array($result))
 		$words[]= "/\\b($row[0])\\b/";

	$newData = preg_replace($words, '<b>$1</b>', $content);

	echo $newData;
}