Dear yousef.aoub ,
Please go to file templates\modules\mod_sj_vm_filter\tmpl\default_categories_manufacturers.php find the code:
<?php echo $key; ?>
=> Edit to:
<?php if ($key=='categories') echo Jtext::_('VM_CATEGORIES'); ?>
<?php if ($key=='manufacturers') echo Jtext::_('VM_MANUFACTURERS'); ?>
Then please go to file : language\en-GB (change to your language file)\en-GB.ini (change to your language file) and add text:
VM_CATEGORIES="categories"
VM_MANUFACTURERS="manufacturers"
PRICE="price"
and the same with your language file.
Thanks & regards!