Something

function limpia($text,$cont,$art,$pagina) {
  $targetChars=array('<', '>', '');    
  $text=str_replace($targetChars, "", $text);    
  $text=str_replace("(gira)", "<img src=\"mana/gira.png\">", $text);  
  //$text=preg_replace('/\(carta\=(.*?)\)/si','<a href="busca.php?carta=\\1" target="_blank" class="news">\\1</a>',$text);  
	if(isset($cont)) {
		if(isset($art)) {
			$text=preg_replace('/\(carta\=(.*?)\)/si','<a href="?cont='.$cont.'&art='.$art.'&carta=\\1" target="_blank" class="news">\\1</a>',$text);
		} else {
			if(isset($pagina)) {
				$text=preg_replace('/\(carta\=(.*?)\)/si','<a href="?cont='.$cont.'&pagina='.$pagina.'&carta=\\1" target="_blank" class="news">\\1</a>',$text);
			} else {
				$text=preg_replace('/\(carta\=(.*?)\)/si','<a href="?cont='.$cont.'&carta=\\1" target="_blank" class="news">\\1</a>',$text);
			}
		}
	} else {
		$text=preg_replace('/\(carta\=(.*?)\)/si','<a href="?carta=\\1" target="_blank" class="news">\\1</a>',$text);
	} 
  $text=preg_replace('/\(negrita\=(.*?)\)/si','<b>\\1</b>',$text);  
  $text=preg_replace('/\(imagen\=(.*?)\)/si','<img src="uploader/\\1.jpg">',$text);    
//smileys
$text=str_replace("-_-", "<img src=\"smiley/1.gif\">", $text);
$text=str_replace("o_o", "<img src=\"smiley/2.gif\">", $text);
$text=str_replace("o_O", "<img src=\"smiley/3.gif\">", $text);
$text=str_replace(":((", "<img src=\"smiley/5.gif\">", $text);
$text=str_replace(":(", "<img src=\"smiley/4.gif\">", $text);
$text=str_replace("8D", "<img src=\"smiley/6.gif\">", $text);
$text=str_replace(":D", "<img src=\"smiley/7.gif\">", $text);
$text=str_replace(":)", "<img src=\"smiley/8.gif\">", $text);
$text=str_replace(":[", "<img src=\"smiley/9.gif\">", $text);
$text=str_replace(":?", "<img src=\"smiley/10.gif\">", $text);
$text=str_replace("x_x", "<img src=\"smiley/11.gif\">", $text);
$text=str_replace(":|", "<img src=\"smiley/12.gif\">", $text);
$text=str_replace("^^'", "<img src=\"smiley/13.gif\">", $text);
$text=str_replace("^^", "<img src=\"smiley/14.gif\">", $text);
$text=str_replace(":P", "<img src=\"smiley/15.gif\">", $text);
//personajes
$text=str_replace("(robot)", "<img src=\"personajes/1.gif\">", $text);
$text=str_replace("(payaso)", "<img src=\"personajes/2.gif\">", $text);
$text=str_replace("(bicho)", "<img src=\"personajes/3.gif\">", $text);
$text=str_replace("(dragon)", "<img src=\"personajes/4.gif\">", $text);
$text=str_replace("(combo)", "<img src=\"personajes/5.gif\">", $text);
$text=str_replace("(sayan)", "<img src=\"personajes/6.gif\">", $text);
$text=str_replace("(ataque)", "<img src=\"personajes/7.gif\">", $text);
$text=str_replace("(mordiscos)", "<img src=\"personajes/8.gif\">", $text);
$text=str_replace("(mario)", "<img src=\"personajes/9.gif\">", $text);
$text=str_replace("(ogro)", "<img src=\"personajes/10.gif\">", $text);
$text=str_replace("(friki)", "<img src=\"personajes/11.gif\">", $text);

//simbolos
$text=str_replace("(gira)", "<img src=\"mana/gira.png\">", $text);  
  $text=str_replace("(azul)", "<img src=\"mana/azul.png\">", $text);
  $text=str_replace("(negro)", "<img src=\"mana/negro.png\">", $text);
  $text=str_replace("(verde)", "<img src=\"mana/verde.png\">", $text);
  $text=str_replace("(rojo)", "<img src=\"mana/rojo.png\">", $text);
  $text=str_replace("(blanco)", "<img src=\"mana/blanco.png\">", $text);
  $text=str_replace("(0)", "<img src=\"mana/0.png\">", $text);  
  $text=str_replace("(1)", "<img src=\"mana/1.png\">", $text);
  $text=str_replace("(2)", "<img src=\"mana/2.png\">", $text);
  $text=str_replace("(3)", "<img src=\"mana/3.png\">", $text);
  $text=str_replace("(4)", "<img src=\"mana/4.png\">", $text);
  $text=str_replace("(5)", "<img src=\"mana/5.png\">", $text);
  $text=str_replace("(6)", "<img src=\"mana/6.png\">", $text);
  $text=str_replace("(7)", "<img src=\"mana/7.png\">", $text);
  $text=str_replace("(8)", "<img src=\"mana/8.png\">", $text);
  $text=str_replace("(9)", "<img src=\"mana/9.png\">", $text);
  $text=str_replace("(10)", "<img src=\"mana/10.png\">", $text);
  $text=str_replace("(11)", "<img src=\"mana/11.png\">", $text);
  $text=str_replace("(12)", "<img src=\"mana/12.png\">", $text);
  $text=str_replace("(13)", "<img src=\"mana/13.png\">", $text);
  $text=str_replace("(14)", "<img src=\"mana/14.png\">", $text);
  $text=str_replace("(15)", "<img src=\"mana/15.png\">", $text);
  $text=str_replace("(16)", "<img src=\"mana/16.png\">", $text);
  $text=str_replace("(17)", "<img src=\"mana/17.png\">", $text);
  $text=str_replace("(18)", "<img src=\"mana/18.png\">", $text);
  $text=str_replace("(19)", "<img src=\"mana/19.png\">", $text);
  $text=str_replace("(20)", "<img src=\"mana/20.png\">", $text);
  $text=str_replace("(azulnegro)", "<img src=\"mana/azulnegro.png\">", $text);
  $text=str_replace("(azulrojo)", "<img src=\"mana/azulrojo.png\">", $text);
  $text=str_replace("(blancoazul)", "<img src=\"mana/blancoazul.png\">", $text);
  $text=str_replace("(blanconegro)", "<img src=\"mana/blanconegro.png\">", $text);
  $text=str_replace("(negrorojo)", "<img src=\"mana/negrorojo.png\">", $text);
  $text=str_replace("(negroverde)", "<img src=\"mana/negroverde.png\">", $text);
  $text=str_replace("(rojoblanco)", "<img src=\"mana/rojoblanco.png\">", $text);
  $text=str_replace("(rojoverde)", "<img src=\"mana/rojoverde.png\">", $text);
  $text=str_replace("(verdeazul)", "<img src=\"mana/verdeazul.png\">", $text);
  $text=str_replace("(verdeblanco)", "<img src=\"mana/verdeblanco.png\">", $text);  
//BICOLOR INVERTIDO
  $text=str_replace("(negroazul)", "<img src=\"mana/azulnegro.png\">", $text);
  $text=str_replace("(rojoazul)", "<img src=\"mana/azulrojo.png\">", $text);
  $text=str_replace("(azulblanco)", "<img src=\"mana/blancoazul.png\">", $text);
  $text=str_replace("(negroblanco)", "<img src=\"mana/blanconegro.png\">", $text);
  $text=str_replace("(rojonegro)", "<img src=\"mana/negrorojo.png\">", $text);
  $text=str_replace("(verdenegro)", "<img src=\"mana/negroverde.png\">", $text);
  $text=str_replace("(blancorojo)", "<img src=\"mana/rojoblanco.png\">", $text);
  $text=str_replace("(verderojo)", "<img src=\"mana/rojoverde.png\">", $text);
  $text=str_replace("(azulverde)", "<img src=\"mana/verdeazul.png\">", $text);
  $text=str_replace("(blancoverde)", "<img src=\"mana/verdeblanco.png\">", $text);   
  $text=str_replace("(x)", "<img src=\"mana/x.png\">", $text);
  return str_replace("\n", "<br>", $text);
}