foreach ($slovo as $v)
$zapros_catalogue .= " catalogue.category like '%{$v}%' or mobile.title like '%{$v}%' or ";
$zapros_catalogue = substr($zapros_catalogue,0, strlen($zapros_catalogue)-3);
$query_catalogue = mysql_query("select catalogue.category as name_category, mobile.id, mobile.category, mobile.title from mobile left join catalogue on mobile.category = catalogue.id where {$zapros_catalogue} order by id desc");