Fix: useing "preg_quote" is more simpler

htdocs/admin/agenda_xcal.php

htdocs/admin/paybox.php

htdocs/admin/webcalendar.php

htdocs/admin/webservices.php

htdocs/categories/categorie.class.php

htdocs/includes/menus/barre_top/eldy_backoffice.php

htdocs/includes/menus/barre_top/eldy_frontoffice.php

htdocs/includes/menus/barre_top/rodolphe.php

htdocs/lib/functions2.lib.php

htdocs/product.class.php