"Submit Sample" is a "Run Process" element and "Manage Sample" is a "CRUD" element. We can combine the ability to "Run Process" into CRUD's add button. With this, we can hide the "Sample Approval Process" category.
First of all, obtain the "Custom ID" / Link ID or the "Run Process" element as shown in the figure above.
Then, insert the following script into the "Custom Footer" of the CRUD.
$("button[value='CRUD_New']").click( function(event){
event.preventDefault();
window.location.href = "sample_submit_process"; //replace the value with the custom ID of Run Process
});
By doing so, we have remove the default capability of "Add Record" in CRUD and points it to "Run Process".