Ok et si tu mets $this->plugin( 'ahreflisting', $link, $link_name->getOutput(2), 'target="_blank"', array('delete'=>false), 1 ); en com dans le case 3 et que tu fais:

echo 'lien: '.$link->website.'et ancre: '.$link->link_name;

Oui avec des //
Tu mets ma ligne de code en dessous (ou au dessus ou où tu veux tant que c'est dans le case 3 et avant le break)

echo '<pre>';
print_r($website);
echo '</pre>';

j'obtiens ceci :

mFieldType_corewebsite Object
(
    [name] => website
    [id] => 12
    [value] => http://www.leflair.fr
    [size] => 0
    [arrayFieldElements] => Array
        (
            [0] => 
        )

    [searchFields] => 
    [params] => JRegistry Object
        (
            [data:protected] => stdClass Object
                (
                    [openNewWindow] => 1
                    [useMTVisitRedirect] => 0
                    [text] => 
                    [maxUrlLength] => 60
                    [clippedSymbol] => ...
                    [hideProtocolOutput] => 1
                    [showGo] => 1
                    [showSpider] => 0
                )

        )

    [isCore] => 1
    [numOfInputFields] => 1
    [numOfSearchFields] => 1
    [allowHTML] => 
    [counter] => 0
    [isFile] => 
    [linkId] => 53
    [fieldType] => corewebsite
    [caption] => Site web
    [defaultValue] => 
    [prefixTextMod] => 
    [suffixTextMod] => 
    [prefixTextDisplay] => 
    [suffixTextDisplay] => 
    [catId] => 0
    [ordering] => 12
    [hidden] => 0
    [requiredField] => 1
    [hideCaption] => 0
    [tagSearch] => 0
    [simpleSearch] => 1
    [advancedSearch] => 1
    [searchCaption] => 
    [detailsView] => 1
    [summaryView] => 1
    [class] => class mFieldType_corewebsite extends mFieldType_weblink {
	var $name = 'website';

	function getOutput() {
		$maxUrlLength = $this->getParam('maxUrlLength',60);
		$text = $this->getParam('text','');
		$openNewWindow = $this->getParam('openNewWindow',1);
		$useMTVisitRedirect = $this->getParam('useMTVisitRedirect',1);
		$hideProtocolOutput = $this->getParam('hideProtocolOutput',1);
	
		$html = '';
		$html .= 'getValue();
			if(strpos($value,'://') !== false && $hideProtocolOutput) {
				$value = substr($value,(strpos($value,'://')+3));

				// If $value has a single slash and this is at the end of the string, we can safely remove this.
				if( substr($value,-1) == '/' && substr_count($value,'/') == 1 )
				{
					$value = substr($value,0,-1);
				}
			}
			if( empty($maxUrlLength) || $maxUrlLength == 0 ) {
				$html .= $value;
			} else {
				$html .= substr($value,0,$maxUrlLength);
				if( strlen($value) > $maxUrlLength ) {
					$html .= $this->getParam('clippedSymbol');
				}
			}
		}
		$html .= '';
		return $html;
	}
	
	function getInputHTML() {
		$showGo = $this->getParam('showGo',1);
		$showSpider = $this->getParam('showSpider',0);
		$inBackEnd = (substr(dirname($_SERVER['PHP_SELF']),-13) == 'administrator') ? true : false;
		$html = '';
		$html .= '';
		if($showGo && $inBackEnd) {
			$html .= ' ';
			$html .= '';
		}
		
		if($showSpider && $inBackEnd) {
			$html .= ' ';
			$html .= '';
			$html .= '';
		}
		return $html;
	}
	
}
    [attachment] => 
)

case 3:
                                        echo 'lien: '.$link->website.'et ancre: '.$link->link_name;
					//$this->plugin( 'ahreflisting', $link, $link_name->getOutput(2), 'target="_blank"', array('delete'=>false), 1 );

echo '<a href="'.$link->website.'">'.$link->link_name.'</a>;

case 3:
                                        echo '<a href="'.$link->website.'">'.$link->link_name.'</a>;
					//$this->plugin( 'ahreflisting', $link, $link_name->getOutput(2), 'target="_blank"', array('delete'=>false), 1 );

case 3:
                                        echo '<a href="'.$link->website.'">'.$link->link_name.'</a>';
                                        //$this->plugin( 'ahreflisting', $link, $link_name->getOutput(2), 'target="_blank"', array('delete'=>false), 1 );

Comment ça?
Edit: Il manque le dernier ' apparemment.

Pas de soucis
Par contre, ce n'est pas une solution "durable" et pas top. Déjà à chaque màj du plugin, la ligne va virer, si tu changes de choix, tu perds la modif etc...