I want to pass a variable with the block code like of JSON type in magento,
{{block type=\"multibanners/multibanners\" category_id=\"9\" name=\"multibanners\
When adding block on a cms pages remove style from block code.
{{block type="multibanners/multibanners" name="multibanners" alias="multibanners" template="multibanners/multibanners.phtml" category_id="8"}}
To get the category_id in your phtml or Block use $this->getCategoryId().
$this->getCategoryId()