function find_words() {

$a = mysql_query("SELECT word from dictionary")or die(mysql_error());
while($a1=mysql_fetch_row($a)) {
$value = "/$a1[0]/";
$b = the_content();
$replacewith = "<b>$value</b>";
$replaced = preg_replace($value, $replacewith,$b); 
}

return "$replaced";
}